
Model 8640B
TM 9-4935-601-14-7&P
Table 1-2. Recommended Test Equipment (2 of 7)
Instrument Type
Critical Specifications
Suggested Model
Use*
3 dB Attenuator
Accuracy: ±0.5 dB to 550 MHz
HP 8491A
P,A
Option 003
10 dB Attenuator
Accuracy: ±0.5 dB to 550 MHz
HP 8491A
P,A
Option 010
20 dB Attenuator
Accuracy: ±0.5 dB to 550 MHz
HP 8491A
P,A
Option 020
Crystal Detector
Range: 0.45 - 550 MHz
HP 8471A
P
Low Level Sensitivity: >0.35 mV/µW
No internal dc return
Crystal Detector
Range: 10 - 550 MHz
HP 423A
P
Maximum Sensitivity: at 15 - 17 dBm
input
With internal dc return
Digital Voltmeter
DC Accuracy: ± (0.01% of reading
HP 3480B/
P,A,T
+0.02% of range)
3484A (with
AC (True RMS) Accuracy: ±0.1%
Options 042,
of reading
043)
Ohms Range: to 1 k
Ω
Digital to Analog
Accuracy: 1% of full scale
HP 581A
P
Converter
Input Code: 1248 with 1 (on) state
Option 002
positive (compatible with Fred-
quency Counter)
Output: Compatible with Strip
Chart Recorder
Directional Coupler
Range: 100 - 550 MHz
HP 778D
P
Coupling Attenuation: 20 dB
Option 12
Directivity: 36 dB
VSWR: <1.1:1
Distortion Analyzer
Range: 20 Hz to 600 kHz
HP 333A
P
Distortion Range: <0.1%
Minimum Input: <300 mVrms
FM Discriminator
Ranges: 100 kHz to 10 MHz
HP 5210A
P,A
Linear Analog Output: 1V for full
scale
*P = Performance; A = Adjustment: T = Troubleshooting
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