Daqarta for DOS Contents
Initial Release: 5-22-99
8255-type parallel port (not a standard printer port) for control.
You can control up to four PA3s with this TDT1.ATN driver. Note that this only controls attenuators using the "legacy" System 1, not the newer System 2 which uses a serial port or fiber-optic link.
The control menu for this board is activated by CTRL-F10... think of "F10-uator" as a mnemonic.
DQA.CFG file. Each parameter is given as a letter and colon, followed immediately by a value or a letter-plus-value combination. Use a space to separate parameters. For example:
TDT1.ATN A:h310 D:A3 R:2The order of the parameters is not important.
If you place the .ATN line too early in the DQA.CFG file, Daqarta will exit with:
'Non-ADC module must not appear before 5th line of DQA.CFG file.'
You can check to see which parameters have been set, either via the configuration line or by default, by checking the board information summary available via the ALT-H Plug-In Help system.
Racks, with each Rack consisting of up to 8 Devices. However, only 4 devices will fit into a standard PLX1 "device caddie".
To tell the Daqarta parameter parser that the value is in hexadecimal, precede it with an 'h', as in:
TDT1.ATN A:h330The default address is h310.
Daqarta checks at the address given, and if it does not find a valid 8255-type port there it exits with a message giving the address it tried:
'8255-type parallel port for WILSONIC attenuator control not found at 0330h.'The only exception is if you set A:0 to allow viewing of this board Help system without having a board installed.
dB cutoff between 1 and 2 Hz.
If you would prefer DC coupling, use the C:1 parameter.
Note that the TDT1.ATN driver does nothing to change the coupling after start-up. You are free to change individual PA3 modules via their front-panel pushbuttons.
Rack, though typically only 4 are installed per PLX1. Devices are numbered from 0 to 7 in each Rack.
This TDT1.ATN driver supports up to four PA3 attenuator devices. If you don't give any D: parameter, four PA3s will be assumed, numbered 0 through 3. Otherwise, you must give the Device Number of any PA3 modules to be controlled. You must also precede the number itself with an 'A' to indicate Attenuator, since other device types may be supported in the future.
For example, if you have two PA3 modules and they are set to Device Numbers 1 and 3, you would set:
TDT1.ATN D:A1 D:A3The order of appearance on the configuration line is not significant. The devices will be assigned to positions in the control menu in Device Number order, from the top down.
configuration line tells the driver not to look for the file. You would probably only want to use this option if you are really short of DOS memory, since loading the Help file only increases memory use by a few hundred bytes for its separate link stack and directory. (The file itself shares the text buffer of the Main Help file.)
Note that ALL Help files, including main, can be omitted via an F:0 parameter on the INIT line (first line) of the DQA.CFG file. If this is present, no individual module Help will be loaded.
Devices, where each Rack can hold up to 8 Devices. Racks are numbered from 1 to 7... there is no Rack 0. By default, Rack 1 is assumed. If the PA3s that you want to control with this module are in a higher Rack, you must specify that with the R: parameter, as in:
dB, so when you scroll up to get higher output you get less-negative dB values. Maximum output is at 0 dB.
Others prefer that "up" actually increase the attenuation, since that is the variable being controlled. You can tell Daqarta to use that convention via the U:1 parameter, as in:
TDT1.ATN U:1With this option the maximum output is still 0 dB, but now you must scroll DOWN to get to there from the starting Off (high attenuation) state. Attenuation is shown in positive dB.
This is simply a matter of personal preference.
Note that for direct entry, you never need to include a minus sign... it will be ignored if you do, regardless of which option has been chosen.
dB setting of the indicated PA3 attenuator. The headers like 'Attn0 dB' refer to Device Number 0, which may or may not correspond to the PA3 location in your Rack or caddie.
If you have used the U:1 parameter option, then scrolling up will give increasing attenuation, which means less output. The default will give decreasing negative dB values as you scroll up, which means more output.
For direct entry, you never need to enter a minus sign.
If you enter or scroll to a value beyond 99 dB, the display will show 'Off' and the output will be muted. In that case the total attenuation will be much more than 100 dB.
IM3 Interface Module DB37 Female .------. -15 V | 19 \ +15 V | 18 37 | Gnd +5 V | 17 36 | Gnd AIN-B | 16 35 | Gnd AINA | 15 34 | Gnd NC | 14 33 | Gnd DC0 | 13 32 | NC DC2 | 12 31 | DC1 DC4 | 11 30 | DC3 DC6 | 10 29 | DC5 NC | 9 28 | DC7 AD0 | 8 27 | NC AD2 | 7 26 | AD1 AD4 | 6 25 | AD3 AD6 | 5 24 | AD5 IN0 | 4 23 | AD7 IN2 | 3 22 | IN1 IN4 | 2 21 | IN3 Gnd | 1 20 | IN5 | / `------'
IM3 Interface Module DB25 Male .------. TRG | 13 \ AIA | 12 25 | MMK ANAGND | 11 24 | AIB SIGGND | 10 23 | GND SYNTRG | 9 22 | ACT AD6 | 8 21 | AD7 AD4 | 7 20 | AD5 AD2 | 6 19 | AD3 AD0 | 5 18 | AD1 DC6 | 4 17 | DC7 DC4 | 3 16 | DC5 DC2 | 2 15 | DC3 DC0 | 1 14 | DC1 | / `----- '
PIO-12 or PIO-24 8255 Parallel Port DB37 Female .------. Gnd | 19 \ + 5 V | 18 37 | PA0 (TDT - DC0) Gnd | 17 36 | PA1 (TDT - DC1) + 12 V | 16 35 | PA2 (TDT - DC2) Gnd | 15 34 | PA3 (TDT - DC3) - 12 V | 14 33 | PA4 (TDT - DC4) Gnd | 13 32 | PA5 (TDT - DC5) - 5 V | 12 31 | PA6 (TDT - DC6) Gnd | 11 30 | PA7 (TDT - DC7) (TDT - AD0) PB0 | 10 29 | PC0 (TDT - AD1) PB1 | 9 28 | PC1 (TDT - AD2) PB2 | 8 27 | PC2 (TDT - AD3) PB3 | 7 26 | PC3 (TDT - AD4) PB4 | 6 25 | PC4 (TDT - AD5) PB5 | 5 24 | PC5 (TDT - AD7) PB6 | 4 23 | PC6 (TDT - AD7) PB7 | 3 22 | PC7 Int | 2 21 | Gnd Int Dis | 1 20 | + 5 V | / `------'
PA3 Atttenuator Parallel Port Connector Pinouts Parameters, Configuration Pinouts, Connector PLX1 Plastic Device Caddie
Questions? Comments? Contact us!We respond to ALL inquiries, typically within 24 hrs.
25 Years of Innovative Instrumentation
© Copyright 1999 - 2006 by Interstellar Research