HP 8642A Operation And Calibration Manual

Operation Model 8642A/B
Amplitude (cont'd)
HP-IB
Codes
AMPTD OFF 0-"1
RF OFF/ON
How to Turn Off the Amplitude Output
The RF output can be turned off using the following method:
., By selecting the ( OFF OR) key when amplitude is the active function (HP-IB:
APOF) The amplitude display will read APOFF.
When amplitude is turned off in this way, the RF output and all l1armonics,
subharmonics, and all other spurs will be reduced to a level below -140.0 dBm (0023 uV,
0.046
EMF uV, -33.0 dBuV, or -27.0 dB EMF uV).
~ By selecting I RF OFFZQtO. Amplitude will be toggled off or on each time this key
is selected.
Amplitude does not have to be the active function to reduce RF output amplitude with
the ( SF OFF/ON) key This function reduces the level of the carrier frequency and
associated harmonics without adjusting the output attenuators. (Refer to Table 3 -14
below.) The amplitude portion of the display reads RF.OFF.
Table 3-14. RF.OFF Output Amplitude Levels
Outpul Harmonic
RF Frequency (MHz) Signal
Attenuation
Attenuation (dB)*
(dB)*
1057.500001 to 2115.000000 5-140 5-140
528.750001 to 1057.500000
5-75
5-110
0.100000 to 528.750000
5-140
5-70
(except Heterodyne Band)
0.100000 to 132.187500
5-75
5-110
(HeterOdyne Band Only)
'dB relative to the carrier signal's original amplitude.
Keys
Codes Keys
Codes
AMPTO AP
dBJ1V DU
dBm
OM or DB
EMF EMON, EMOF
V VL
OFF ON
APOF, APON
mV
MV
RF OFF/ON RO, R1
J1V
UV SPCL
SP
Comments
Ovcrranging Specified Amplitude
3-72
Amplitudes as high as 20 dBm (2.24V, 127.0 dBuV, 4.49 EMF V, or 133.0 dB EMf.' uV)
can be set at any Rf.' frequency setting, but the level is not specified above the values
listed
in Table 3-13 (on page 3-69).

HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English