Table of Contents
Advertisement
For irregular frequency steps use a variable to represent the numerical data, such as:
100
FOR N = 1 TO 4
110 READ A
120
OUTPUT 719; "FP" ; A
130
NEXT N
140
DATA
1E7, 1E8, 1E9, 1E10
Line 140 contains the list of frequencies (in Hz units; hence, 10 MHz, 100 MHz, 1 GHz, and 10 GHz)
which are read in line 110. The semicolon beween the "FP" and A (an artibrary variable) in line 120
signifies to the computer that a terminator should not separate the code from the variable.
IF Increment Frequency, is similar to the HP-IB commands TRIGGER and GET (group execute
trigger). IF must be used to trigger the SN function, and can be used to increment SM and other
CW frequency functions (however, IF cannot be used to trigger FP). For example:
100
OUTPUT 719; "SF1GZ
CW1GZ"
110
FOR N = 1 TO 20
120
OUTPUT 719; "IF"
130
NEXT N
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 8340B/41B. IL/OL is similar to the SAVE/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 (SAVE/RECALL has a capacity of 9 memory registers,
located in the HP 8340B/41B; IL/OL data is stored in the computer's mass storage device). IL is
explained under the OL programming code.
KR
Keyboard Release, is used with the NA code. If NA bit 1 is setTrue (=1), the HP 8340B/41B 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: 1) Determine which key was pressed by using the OM code 2)
process the key closure information; 3) use KR to relese the keyboard, and return to step 1.
NAb Network Analyzer configuration, established the operating modules that are used when the HP
8340B/41B 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 (GET) 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 8340B/41B 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):
Enable keyboard hold off, released by KR.
3-66
Operating Information
HP 8340B/41B
Advertisement
Table of Contents
