Detailed Listing of Implemented Versions

Rupert Crouch

The CAMAC 166 module generates a single frame of MDAT information for incorporation onto the MDAT link. Frames are presently transmitted at a 720 Hz rate. Each frame, consisting of 28 bits of data, has a serial transmit time of 2.75 microseconds. Frames are generally transmitted in ascending order of type code number and are transmitted at approximately ten microsecond intervals. 

The data to be transmitted by the 166 module are generally received as parallel data at the module I/O connector. The module may also receive data for transmission from the CAMAC dataway. Custom PALs on each module adapt to the particular protocol of the instrumentation sourcing the data. DIP switches on the module provide the Type Code to be transmitted with the data and the version number of the module. Adjustment pots are provided on board to control the output symmetry and the delay from the 720 Hz event, TCLK $07, at which the transmission is initiated. 

There are a total of four PALs on the 166 MDAT Transmitter module. 16603A.DAT and 16608A.DAT are common to all versions. PALs 16618n.DAT and 16652n.DAT are custom to implemented versions. A working spare for most implemented versions is available in the Controls Lab area on the first floor of the Linac Annex.

All data are refreshed at a 720 Hz rate comfortably between TCLK $07 events. Data are loaded into the transmitters at the $07 event and thereupon serially transmitted at ten microsecond intervals.

This module generates the serial transmission for Tevatron Programmed I. Data is received from TECAR and is clocked by appropriate control lines. TECAR presents 16 bits of data as an unsigned integer with a full-scale value of 5000 amps and LSB valued at 5000/65535 or 76.29394531 ma. The CAMAC 160 modules receive the upper 12 bits of this transmitted value, for which the LSB is 1.220703125 amps. 

This module clocks TECAR data when CL1 is high and when CL2 is pulsed. This transmission is launched ten microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 1 microsecond. 

This module generates the serial transmission for Tevatron Programmed I Dot. Data are received from TECAR and are clocked by appropriate control lines. TECAR presents 16 bits of data as a signed 2's complement integer with a full-scale value of 439.453125 amps/sec with a corresponding LSB valued at 13.411045 ma/sec. A select group of 160 modules receive the upper 12 bits of this transmitted value, for which the LSB is .21457672 amps/sec. 

This module clocks TECAR data when CL1 is high and when CL3 is pulsed. This transmission is launched twenty microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 10.8 microseconds.

This module generates the serial transmission for Tevatron Measured I. Data is received from TECAR and is clocked by appropriate control lines. TECAR presents 16 bits of data as an unsigned integer with a full-scale value of 5000 amps and LSB valued at 5000/65535 or 76.29394531 ma. A select group of CAMAC 160 modules receive the upper 12 bits of this transmitted value, for which the LSB is 1.220703125 amps. 

This module clocks TECAR data when CL1 is low and when CL2 is pulsed. This transmission is launched thirty microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 20.3 microseconds.

This module generates the serial transmission for Tevatron Measured I Dot. Data is received from TECAR and is clocked by appropriate control lines. TECAR presents 16 bits of data as a signed 2's complement integer with a full-scale value of 439.453125 amps/sec with a corresponding LSB valued at 13.411045 ma/sec. A select group of 160 modules receive the upper 12 bits of this transmitted value, for which the LSB is .21457672 amps/sec. 

This module clocks TECAR data when CL1 is low and when CL3 is pulsed. This transmission is launched forty microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 31 microseconds.

Version 5.0: OBSOLETE, now MECAR generated at MI60N rack MI60202 

This module generates the serial transmission for Main Ring Measured I. The data for this transmission are sourced by MECAR which effects a pass through of M:MIBEND in digital form. 

Input data is terminated with 1K ohms and CL1 is terminated with 100 ohms. Input data is latched 2 microseconds after the assertion of CL1 and are loaded into the transmitter 200 nanoseconds thereafter. The transmission is nominally 70 microseconds after TCLK Event $07. Delay on the module from $07 to beginning of transmission is approximately 64 microseconds. 

Full scale for the transmitted parameter of Measured Main Ring I is 2000 amps. The LSB for 12 bits of data is valued at .488289 amps. The LSB of the 16-bit word is valued at 30.518 ma. These data are transmitted as an unsigned positive integer. 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh. 

Version 6.0: OBSOLETE, now MECAR generated at MI60N rack MI60202

This module generates the serial transmission for Programmed Main Ring I. The data for this transmission are sourced by MECAR. Active high data are sourced at a 720Hz rate. 

Full scale for the transmitted parameter of Programmed Main Ring I is 2000 amps. The LSB for 12 bits of data is valued at .488289 amps. The LSB of the 16-bit word is valued at 30.518 ma. These data are transmitted as an unsigned positive integer. 

This transmission is launched approximately fifty microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 45 microseconds. (This delay adjustment is somewhat coarse.) 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh. 

Version 7.0: OBSOLETE, now MECAR generated at MI60N rack MI60202

This module generates the serial transmission for Main Ring Programmed I Dot. The data for this transmission is sourced by MECAR. 

Full scale for the transmitted parameter of Programmed Main Ring I Dot is 5000 amps/sec. This data is transmitted as a signed 2's complement integer. The LSB for 12 bits of data is valued at 2.4414806 amps/sec. The LSB of the 16-bit word is valued at 152.5925 ma/sec. 

This transmission is launched approximately sixty microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 55 microseconds. 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh. 

Version 8.0: OBSOLETE, now MECAR generated at MI60N rack MI60202

This module generates the serial transmission for Main Ring Measured I Dot. The data for this transmission are sourced by MECAR which effects a pass through of M:MDIBND in digital form. 

Full scale for the transmitted parameter of Measured Main Ring I Dot is 5000 amps/sec. This data is transmitted as a signed 2's complement integer. The LSB for 12 bits of data is valued at 2.4414806 amps/sec. The LSB of the 16-bit word is valued at 152.5925 ma/sec. 

This transmission is launched approximately eighty microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 75 microseconds. 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh.

This module generates the serial transmission for Main Ring Intensity. A nearby NIM module (constructed by Steve Bjerklie) sources the data for this transmission. The NIM module differentially receives the analog signal for M:IBEAMB and digitizes it at a 720 Hz rate. The digitize command is provided by the 166 module. The NIM module presents 16 bits of data to the 166, unsigned and left justified, with a Convert Complete status line. The Convert Complete is active high, sourced by a 74128 driver, and is wired to the CL1 input of the 166 module. 74LS541 drivers source the data. 

The data is transmitted as an unsigned positive integer. Full scale for the transmitted parameter of Main Ring Intensity is 6.66 x E13 protons. The LSB for 12 bits of data is valued at 1.626 x E10 protons. The LSB of the 16-bit word is valued at 1.01625 x E9 protons. 

This transmission is launched nominally 200 hundred microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 190 microseconds. 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh. 

This module generates serial transmissions for any MDAT parameter. The data for this transmission is sourced by an analog to digital converter that digitizes the output of a signal generator at a 720 Hz rate. The signal generator is normally synced at a 15 Hz rate. The 720 Hz and DCE (set to TCLK Event $0F) outputs of the 166 are utilized as the control signals to this external hardware. The EOC pulse from the digitizer is applied to the CL1 input for synchronization.

This module generates the serial transmission for Tevatron Intensity. A nearby NIM module (constructed by Steve Bjerklie) sources the data for this transmission. The NIM module differentially receives the analog signal for T:IBEAMB and digitizes it at a 720 Hz rate. The digitize command is provided by the 166 module. The NIM module presents 16 bits of data to the 166, unsigned and left justified, with a Convert Complete status line. The Convert Complete is active high, sourced by a 74128 driver, and is wired to the CL1 input of the 166 module. 74LS541 drivers source the data. 

This module was only active during Fixed Target Physics operations. The activating 720 Hz event is gated on by an internal flag that is set by TCLK event $49 and reset by TCLK event $C1. When activated, this transmission is launched nominally 90 hundred microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 76 microseconds. 

Input data is terminated with 1K ohms and CL1 is terminated with 100 ohms. Input data is latched 2 microseconds after the assertion of CL1 and are loaded into the transmitter 200 nanoseconds thereafter. The transmission is nominally 90 microseconds after the TCLK Event $07. 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh. 

Full scale for the transmitted parameter of Tevatron Intensity is 5.36 x E13 protons. The LSB for 12 bits of data is valued at 1.3089 x E10 protons. The LSB of the 16-bit word is valued at 8.1607 x E8 protons. 

NOTE: The digitizing NIM module has had a history of hanging up. The fix is to extract and reseat the NIM module in the NIM bin or to cycle NIM power.

This module generates the serial transmission for Tevatron Colliding Physics and Low Fixed-Target Intensity.  

A nearby NIM module (constructed by Steve Bjerklie) sources the data for this transmission. The NIM module differentially receives the analog signal for T:IBEAM and digitizes it at a 720 Hz rate. The digitize command is provided by the 166 module. The NIM module presents 16 bits of data to the 166, unsigned and left justified, with a Convert Complete status line. The Convert Complete is active high, sourced by a 74128 driver, and is wired to the CL1 input of the 166 module. 74LS541 drivers source the data. 

This module is active during both Colliding Physics and Fixed-Target operations.  

Input data is terminated with 1K ohms and CL1 is terminated with 100 ohms. Input data is latched 2 microseconds after the assertion of CL1 and are loaded into the transmitter 200 nanoseconds thereafter. The transmission is nominally 100 microseconds after the TCLK Event $07. Delay on the module from $07 to beginning of transmission is approximately 86 microseconds. 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh. 

Full scale for the transmitted intensity parameter is 10.00 x E12 protons + p-bars. The LSB for 12 bits of data is valued at 2.4414 x E9. The LSB of the 16 bit word is valued at 1.5259 x E8. These data are transmitted as an unsigned positive integer.

NOTE: The digitizing NIM module has had a history of hanging up. The fix is to extract and reseat the NIM module in the NIM bin or to cycle NIM power.

This module generates the serial transmission for Tevatron Time at 150 GeV. The data for this transmission is sourced by an adjacent CAMAC 266 module (C:REMVB2). This module presents 16 bits of data to the 166 as a signed number with full scale of $7FFF. The data is transmitted as an unsigned 16-bit value. 

Input data are terminated with 1K ohms and are latched and loaded into the transmitter as close to transmit time as possible. No external signals are necessary to effect the load of external data.  

Full scale for the transmitted parameter of Tevatron Time at 150 GeV is 655,350 seconds, 10922.5 minutes, 182.0417 hours, or 7.5851 days. The LSB of the 16-bit word is valued at 10 seconds. 

This transmission is launched nominally 4 microseconds after an external trigger provided by a 377 card in BOOSTER $B3 slot 21 (T:TC52D). Delay on the module from $07 to beginning of transmission is set to 106 (0x6A) microseconds.

This module generates the serial transmission for Tevatron State. The data for this transmission are sourced from the CAMAC dataway and are set at the same time as PA1028, Sequencer. The module driver presents 16 bits of data to the C166. 

Input data are latched immediately after the assertion of F16 and are loaded into the transmitter 250 nanoseconds thereafter. The transmission is nominally 220 microseconds after TCLK event $07. See note below. 

Because the digitize and transmission frequencies are asynchronous, the module loads the transmitter and triggers the transmission immediately thereafter (every 1.4ms). If a new set of data is available from CAMAC during the period from 500ns before the load of the transmitter until the trigger for the transmission, the new data will be ignored. External data input is not an allowable function for this module.

* C377 ($B2N21) Chan 0 (G:TC03D) 9C (156us)delay wired to Ext. Trig input

1 (G:TC04D) A6 (166us)delay

2 (G:TC12D) D9 (217us)delay

This module generates the serial transmission for Tevatron RF Anode Program and also for the Tevatron Low Beta Program. The data for these transmissions are sourced by an adjacent CAMAC 468 module in $F0 N3 and a CAMAC 467 module in $B2 N3,4. The 468 generates an analog waveform (T:APG) as a function of time and digitizes it at a 1 kHz rate. The 467/8 module presents 16 bits of data to the C166, unsigned and left justified, with a Strobe line. The Strobe is active low, sourced by a 74F3037 driver, and is wired to the CL1 input of the C166 module. 74HCT541 drivers source the data.

Input data and the CL1 input are terminated with 1K ohms. Input data is latched immediately after the assertion of CL1 and is loaded into the transmitter 250 nanoseconds thereafter. The transmission is normally 4 microseconds after an external trigger provided by a 377 card in MI $F3 slot 17 (T:TC53D). Delay from $07 to beginning of transmission is set at 103 (0x67) microseconds.

Full scale for the transmitted parameter of Tevatron RF Anode Program is 10V. The LSB of the 16-bit word is valued at 152.5925 millivolts. These data are transmitted as an unsigned positive integer. 

Because the digitize and transmission frequencies are asynchronous, the module loads the transmitter and triggers the transmission immediately thereafter (every 1.4ms). If a new set of data is available from the 468 during the period from 500ns before the load of the transmitter until the trigger for the transmission, the new data will be ignored. When using CAMAC to write data, the data will load at 720 Hz, the same as the transmitter and the trigger, and no data will be dropped.

Version 15.0: OBSOLETE, now MECAR generated at MI60N rack MI60202

This module generates the serial transmission for Main Ring Programmed I Prime MSW (Most Significant Word) in IEEE floating point format. Programmed I Prime is the difference of Main Ring Programmed I and the Tevatron Feed Forward term. 

A VMIVME2510B module in a nearby VME crate sources the data for this transmission. The 2510B is a TTL I/O module. The data it gets is digitized at a 1.44 kHz rate. The 2510B module presents 16 bits of data to the 166 with Select and Enable lines. The Select is active high, sourced by a 74AS645 driver, and is wired to the CL1 input of the 166 module. 74AS645 drivers source the data. 

Input data, CL1 and CL2 are terminated with 1K ohms. Input data are latched 2 microseconds after the assertion of CL1 and are loaded into the transmitter 200 nanoseconds thereafter. The transmission is nominally 160 microseconds after TCLK Event $07. 

This transmission is launched nominally 130 hundred microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 125 microseconds. 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh. 

Version 16.0: OBSOLETE, now MECAR generated at MI60N rack MI60202

This module generates the serial transmission for Main Ring Programmed I Prime LSW (Least Significant Word) in IEEE floating point format. Programmed I Prime is the difference of Main Ring Programmed I and the Tevatron Feed Forward term. A VMIVME2510B module in a nearby VME crate sources the data for this transmission. The 2510B is a TTL I/O module. The data it gets is digitized at a 1.44 kHz rate. The 2510B module presents 16 bits of data to the 166 with Select and Enable lines. The Select is active high, sourced by a 74AS645 driver, and is wired to the CL1 input of the 166 module. 74AS645 drivers source the data. 

Input data, CL1 and CL2 are terminated with 1K ohms. Input data is latched 2 microseconds after the assertion of CL1 and is loaded into the transmitter 200 nanoseconds thereafter. The transmission is nominally 170 microseconds after TCLK Event $07. 

This transmission is launched nominally 140 hundred microseconds after TCLK event $07. Delay on the module from $07 to beginning of transmission is approximately 135 microseconds. 

For safety considerations, the transmitter is always loaded at the occurrence of the 720 Hz clock event - even though the data may not be fresh. 

TECAR 166Mod Name

1 10L D15 MSB ------------

3 11L D13 |

5 12L D11 |

6 12R D10 |

7 13L D9 |

8 13R D8 Programmed & Measured

9 14L D7 Tevatron I & I Dot Data

10 14R D6 |

11 15L D5 |

13 16L D3 |

14 16R D2 |

15 17L D1 |

16 17R D0 LSB -------------

17 8R CLK I, CL2

18 9L CLK I Dot, CL3

20-37 18L et al COMMON

BNC 8L PROG, /MEAS, CL1 (COAX)

3L TCLK Input (COAX, LEMO)

2L TCLK Output

1L MDAT Output (COAX, LEMO)

Note: The primary TCLK Input is from the local 10 Mbit Repeater chassis to the 166 module resident in Slot 17. TCLK is then daisy-chained to Slots 18,19, and 20.

NIM 166 Mod Name

1 10L D15 MSB ------------

3 11L D13 |

4 11R D12 |

5 12L D11 |

6 12R D10 |

7 13L D9 |

8 13R D8 Measured Main Ring I

9 14L D7 or Tevatron Intensity

10 14R D6 |

11 15L D5 |

12 15R D4 |

13 16L D3 |

14 16R D2 |

15 17L D1 |

16 17R D0 LSB -------------

17 8L CL1 Input - Converter Done /Busy

LEMO 4L 720 Hz Digitize Command

26 18L et al COMMON

3L TCLK Input (COAX, LEMO)

2L TCLK Output

1L MDAT Output (COAX, LEMO)

468"B" 166Mod Name

17L 10L D15 MSB----------------

17R 10R D14 |

16L 11L D13 |

16R 11R D12 |

15L 12L D11 |

15R 12R D10 |

14L 13L D9 |

14R 13R D8 |

13L 14L D7 ANODE PROGRAM

13R 14R D6 |

12L 15L D5 |

12R 15R D4 |

11L 16L D3 |

11R 16R D2 |

10L 17L D1 |

18R 8L STROBE CL1

1L, 18L 18L et al COMMON

VMIVME-2510B 64-BIT TTL Digital I/O

(74AS645 Drivers with 1K Terminations on C166 modules)

P4 44pos AMP 166Mod Name

31A No Connections

30A 43 N21, 8R E6 ---------

29A 42 N20, 8R E5 |

27A 40 N18, 8R E3 | 1K terminations

26A 39 N17, 8R E3 |

25A 38 N16, 8R E2 ---------

24A No Connections

23A No Connections

22A 37 N21, 8L S6 ---------

21A 36 N20, 8L S5 |

20A 35 N19, 8L S4 | Selects, CL1

19A 34 N18, 8L S3 | 1K terminations

18A 33 N17, 8L S2 |

17A 32 N16, 8L S1 ---------

16A 30 10L D15 -MSB----

15A 15 10R D14 |

14A 14 11L D13 |

13A 13 11R D12 |

12A 12 12L D11 |

11A 11 12R D10 |

10A 10 13L D9 |

9A 9 13R D8 |

8A 8 14L D7 | ACTIVE HIGH

7A 7 14R D6 | 1K terminations

6A 6 15L D5 |

5A 5 15R D4 |

4A 4 16L D3 |

2A 2 17L D1 |

1A 1 17R D0 -LSB-----

1C-32C 16-29,31,44 1L, 2L, 3L, 7R COMMON

7L, 18L, 18R

1R MDAT OUT (COAX, LEMO)

2R TCLK Output (not connected)

3R TCLK Input (COAX, LEMO)

Note: Data lines are hardwire bussed to all six MDAT transmitters. TCLK inputs and MDAT outputs are individual coax cables.