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Bit 2 set true (1):
Disable "HP-IB SYNTAX ERROR" annunciator that would otherwise appear in
the ENTRY DISPLAY.
Bits 3-7:
Not used
,
Bit 0 is set true by decimal "1," bit 1 is set by decimal "2," and bit 2 is set by decimal 4. A BASIC
example that sets bits 0,1, and 2 true:
100
OUTPUT 719; "NA"&CHR$(7)
In this example, the binary value of decimal 7 (CHR$(7) is concatenated to the NA code (&).
Alternatively, a formatted OUTPUT statement could be used to output the same binary informa¬
tion.
100
OUTPUT 719 USING "2A , B" ; "NA" , 7
The image specifier "2A, B" indicates that two literal characters will be output, followed by a
single binary byte.
Consult the Operating Guide for the specific network analyzer being used for detailed interfacing
information.
OA(d) Output Active parameter, allows the computer to read the numerical value of the presently
active HP 8340B/41B function. The active function is the last-used function, and appears in an
unblanked ENTRY DISPLAY. A BASIC example:
100
OUTPUT 719; "FA6SMZ FB75MZ PL10DB ST1SC"
110
OUTPUT 719; "0A"
120
ENTER 719;A
130
PRINT "ACTIVE PARAMETER ="; A
Sweep time is the active parameter, because it was the last-entered function (line 100). The OA
value read by the computer (read in line 120, and assigned to arbitrary variable A) is always in the
fundamental units of Hz, dB(m), or seconds.
The Om code (byte 2) can be used to determine the presently active function.
OB(d) Output next Band frequency, indicates the frequency of the next bandcrossing. Bandcross-
ings occur at 2.4 GHz, 7.0 GHz, 13.5 GHz, and, in the case of the HP 8340B, 20.0 GHz. A BASIC
example:
100
OUTPUT 719; "CW6GZ"
110
OUTPUT 719; "OB"
120
ENTER 719; A
130
PRINT "NEXT BANDCROSS I NG" ; A/1E9; "GIGAHERTZ"
In this example, the HP 8340B/41B is outputting a 6 GHz CW signal, so the next bandcrossing
points is 7.0 GHz. The OB frequency is always in Hz; line 130 divides the OB value by 1 X 109 for
conversion to GHz units.
OC(3d) Output Coupled parameters, allows the computer to read the values of the start frequency,
center frequency, and sweep times (in this order) of the HP 8340B/41B. The values are always
read in the fundamental units of Hz and seconds. In BASIC:
100
OUTPUT 719; "FA1GZ FB19GZ STAU"
110
OUTPUT 719; "OC"
120
ENTER 719; S,C,T
130
PRINT "START FREQUENCY" ; S/1E9 ; "GHZ"
140
PRINT "CENTER FREQUENCY" ; C/1E9; "GHZ"
150
PRINT "SWEEP TI ME" ; T ; "SECONDS"
The computer would display, for this example, a start frequency of 1 GHz, a center frequency of 10
GHz, and a sweep time of 0.030 seconds.
HP 8340B/41B
Operating Information
3-67
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