IDL connects to GPIB equipment through a Prologix® Ethernet to GPIB interface adapter.
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The network settings are saved on the onboard memory and will not need to be changed. The adapter only accepts one open connection at a time. If two users are simultaneously trying to communicate to the adapter, only the first open connection will have access and the second will be refused. If a user had a computer or application crash while a connection was opened, no new connections will be accepted. To clear this problem, the adapter must have its power cycled. To do this, unplug the adapter and wait a couple of seconds before plugging it back in. It is important to mention that the likelihood of a hung connection is low since the IDL routines have the connection opened for less than a second at a time.
hp_dvm.pro and set_srs.prohp_dvm, mode=mode, range=range, zero=zero, reading=reading, take=take, verbose=verbose
NOTE: Run hp_dvm without any arguments to get the help page
hp_dvm, mode=1, range=8, reading=user_variable, /take
Result:
Mode is set to DC Volts and Range set to AutoRange. Voltage reading is taken and stored into user_variable
hp_dvm, /zero
Result:
DVM is zeroed (Use this with care, maybe if there is an offset even if everything is unplugged from the dvm)
hp_dvm, /take
Result:
Voltage is read and output to screen ONLY, set reading to a user variable for the value to be stored
| MODE: Options | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mode = | Set to Measure |
|---|---|
| 1 | DC Volts |
| 2 | AC Volts |
| 3 | DC Amps |
| 4 | AC Amps |
| 5 | 2-Wire Ohm |
| 6 | 4-wire Ohm |
| RANGE: Options | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| range = | Range set to |
|---|---|
| -2 | 30 mV DC |
| -1 | 300mV AC/DC or 300mA AC/DC |
| 0 | 3 V AC/DC or 3 A AC/DC |
| 1 | 30 V AC/DC or 30 Ohm |
| 2 | 300 V AC/DC or 300 Ohm |
| 3 | 3K Ohm |
| 4 | 30K Ohm |
| 5 | 300K Ohm |
| 6 | 3M Ohm |
| 7 | 30M Ohm |
| 8 | Auto-Range |
/take
/take keyword must be set in order for a measurement to be taken. If not set, no measurement will be taken even if "reading" variable was declared.
/zero
/zero keyword zeros the dvm. This can be useful if signal is known to be zero but offset voltage still exists.
/verbose
/verbose keyword is used mainly for debugging purposes. Keyword sets procedure to output various diagnostic messages to assist in troubleshooting.
set_srs, frq=frq, vpp=vpp, dbm=dbm, off=off, phs=phs, srs2=srs2, help=help
NOTE: Run set_srs, /help to get the help page
set_srs, frq=5e6, dbm=5, /srs2
Result:
SRS2 is set to 5MHz sine wave with a 5dBm amplitude
set_srs, frq=1e7, vpp=3, off=1
Result:
SRS1 is set to 10MHz sine wave with a 3V peak to peak amplitude and 1V positive offset
set_srs.pro Options |
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| Parameter: | Definitions: | Restrictions: |
|---|---|---|
frq |
Frequency [Hz] | 0 < frq < 30e6 |
vpp |
Peak-to-Peak Voltage [V] | -5 < vpp < 5 V Note: Voltage may clip if off is large |
dbm |
milli-deciBell Amplitude [dBm] | -36 < dbm < +23 Note: Voltage may clip if off is large |
off |
DC Offset Voltage [V] | -5 < off < 5 V Note: Voltage may clip if dbm or vpp is large |
phs |
Phase Offset [degrees] | 0 < phs < 7200 |
/srs2
Use /srs2 keyword to control the SRS2 Synthesizer. If keyword is not set, procedure defaults to SRS1 control.
/help
Use /help keyword without any other arguments to bring up the help screen.