HP 8340A Operating Manual page 124

Operating Information
The step size and the starting CW frequency are both set to 1 GHz in line 100. Lines
110 to 130 cause the CW frequency to increment 20 times (i.e., a 1-21 GHz stepped
sweep).
IL123b Input Learn data, is used in conjunction with OL (Output Learn data) to save/
recall various operating configurations of the HP 8340A. IL/ 0 L is similar to the SA VE/
RECALL functions, except with IL/OL the active function in use prior to OL storage is
once again active after the IL restoration (no function is active after a RECALL), and
there is virtually no limit to the number of instrument states that can be stored (SA VE/
RECALL has a capacity of 9 memory registers, located in the HP 8340A; IL/OL data is
stored in the computer's mass storage device). IL is explained under the OL
programming code.
Keyboard Release, is used with the NA code. If NA bit 1 is set True (=l ), the HP 8340A
KR
front panel keys are in a lock-and-release mode. In this mode, the keyboard is locked
(disabled) after any one key has been pressed, and remains locked until released by the
KR code. The typical loop program involves three steps:
pressed by using the OM code; 2) process the key closure information; 3) use KR to
release the keyboard, and return to step 1.
NAb Network Analyzer configuration, establishes the operating modes that are used when
the HP 8340A is interfaced with certain network analyzers. The modes are established
by adding a binary or decimal number to the NA code, where the bits of the number
are deciphered as follows:
Bit 0 set true (1):
Enable network analyzer mode with the following features:
1. Enable group-execute-trigger (GE1) to start a sweep after a mid-sweep
update, if in analog sweep mode.
2. Use Stop Frequency to calculate the end of the band.
3. Disable HP 8340A detection of sweep event markers, bandcrossing points,
and sweep end point.
4.
Do binary search to set sweep reset DAC.
5. Issue end of sweep SRQ for mid-sweep update.
6. Disable automatic alternation when alternating in manual or CW non-swept
mode.
7. Ignore BC following mid-sweep updates, until next GET.
Bit 1 set true (1):
Bit 2 set true (1):
otherwise appear in the ENTRY DISPLAY.
Bits 3-7: Not used.
3-60
Enable keyboard hold off, released by KR
Disable "HP-IB SYNTAX ERROR" annunciator that would
Scans by HB9HCA and HB9FSX
Model 8340A
1) Determine which key was