HP 8642A Operation And Calibration Manual

Model 8642A/B
Description
Procedures
INT
Operation
MODULA TION, PULSE
The Signal Generator can pulse modulate its RF output either with the variable (
internal modulation oscillator or with a dc-coupled external source applied to the
AM/PULSE INPUT.
When the internal pulse modulation source is selected, the pulse repetition rate can be
changed by varying the modulation oscillator frequency. The duty cycle will always
be
50% for internal pulse modulation.
Table 3-23. Pulse Modulation Operating Characteristics
Electrical Characteristics Performance limits Conditions
Pulse Modulation
Output Levels
.:s+15 dBm
1
Pulse On/Off Ratio
>30 dB RF Frequency .:s1057.5 MHz
>45 dB RF Frequency >1057.5 MHz2
Rise/Fall Time
<3.5
J.LS
10% to 90%
Minimum Pulse Width
6/.1s
Maximum Repetition Frequency
50 kHz
Nominal Peak 1.5V
Input Level Required
10
u
tput level accuracy is typically ;:3 dB.
28642B. Band
10.
Note: Put the instrument in its initialized state by selecting ( INSTR PRESET I.
How to Set Pulse Modulation with the Internal Source (Using the Modulation Oscillator)
Source
PULSE (( SHIFT) CNiZ!J ) O!ITJ
Rate
( MOD FREQ I and the desired value of modulation frequency (in kHz or Hz).
Pulse Modulation
PULSE (( SHIFT J CNiZ!J ) and ( OFF ON )
3-127

HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English