HP 8901B

Operation Model 8901B
Number Entered in Code
.1234567899999
1234567890
Numeric Data Syntax. When entering input frequency, entering ratio or limit references, or entering
any numeric
data (other than two-character function codes) into the Modulation Analyzer, certain
requirements must be met:
0 Numeric data may consist of a signed mantissa of up to eight digits, with one decimal point, and
0 The decimal point may fall between any two digits of the mantissa. If a decimal point is entered
0 Any digit beyond the eight allowed for the mantissa will be received as zero.
a one- or two-digit, signed exponent.
before the
first digit, a leading zero will be inserted by the Modulation Analyzer.
The following table shows examples of the differences between data entered into the Modulation
Analyzer and the
data accepted.
Number Accepted by Instrument
0.1 234567
12345678 E02
lbble 3-4. Data Input Examples
Code String Syntax (Sequence Dependency)
For accurate measurement results, functions should be programmed in the following order to insure
proper sequencing of events and switching in the instrument
as appropriate to the measurement. The
letter
X in the following example represents a number.
Function codes that have the same alpha-character should be entered in numeric order to ensure proper
execution; e.g.,
P1 should come before P4.
OUTPUT714;" AU XXX.XX MZ MX DX PX HXM XX.XSP RX TX"
Mode of Operation
Tuning
Input Freq Units (Manual Tuning)
Measurement
Detector
De-emphasis
Filters
Special Functions
b
Ratio h
Trigger >
The following information should be considered in addition to the information above when writing
programming strings.
0 AU (Automatic Operation). When Automatic Operation is used, it should appear at the beginning
of a program string. Automatic Operation sets
all special functions prefixed 1 through 10 to their
zero-suffix mode. Most other special functions are also set to zero-suffix.
0 PO (Pre-Display Off and De-Emphasis Off). When pre-display is turned off using PO, all FM
de-emphasis
is turned off.
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