TB 11-6625-2747-50
SECTION I
IDENTIFICATION AND DESCRIPTION
1.
Test Instrument Identification.
This bulletin
records, and reports required for calibration personnel at
all levels are prescribed by TM 38-750 DA Form 2416
provides information for the periodic calibration of SHF
must be annotated in accordance with TM 38-750 for
Signal Generator AN/USM-47 (Hewlett Packard model
each calibration performed.
626A) and is to be used by calibration personnel at all
b.
Adjustments to be reported on DA Form 2416
levels. Signal Generator AN/USM-47 (HP 626A) will be
an designated (R) at the end of the sentence in which
referred to as the TI (test instrument) throughout this
they appear. Report only those adjustments made and
bulletin.
a. Model variations. None
designated with (R).
3.
Calibration Description.
TI parameters and
b. Time and Technique. The time required for
performance specifications which pertain to this
calibration is approximately 4 hours using the Microwave
calibration are listed in table 1.
Technique.
2. Calibration Data Card (DA Form 2416). a. Forms,
Table 1. Calibration Description
Test instrument parameters
Performance specifications
115 or 230 V 10%, 50 to 60 Hz, 200 W.
Power input requirements
Frequency range
10 to 15.5 GHz.
Frequency accuracy
1.0% of dial indication.
Output range
10 mW to 1 pW (+ 10 dBm to - 90 dBm).
1.0 dB.
Output monitor accuracy
Attenuator
2.0%
Variable from 40 to 4,000 pps. Pulse width variable from 0.5 to 10 sec.
Internal pulse modulation
Modulation
Internal or external pulsed, FM or square wave.
Internal square wave modulation
Variable from 40 to 4,000 Hz.
Internal frequency modulation1
Power line frequency, deviation up to 5 MHz.
External pulse modulation:
Amplitude requirement1
15 to 70 volt peak (positive or negative).
1.0 to 2,500 sec.
Width requirement1
External frequency modulation1
Provides capacitive coupling to repeller of klystron. Max deviation 5 MHz.
Sync out signal1
20 to 50 v into 1,000 ohm load.
Better than sec rise time.
(1) Simultaneous with RF pulse-positive.
(2) In advance of RF pulse-positive, variable 3 to 300 sec.
Pulse or sine wave; 5 to 50 V, 0.5 to 5 sec wide.
1
External sync
1
These specifications are for information only and are not necessarily verified in this procedure.
SECTION II.
EQUIPMENT REQUIREMENTS
selected must be verified to perform satisfactorily prior to
equipment used in this calibration procedure. This
use and must bear evidence of current calibration. The
equipment is issued with the secondary transfer
equipment must meet or exceed the minimum use of
calibration standards set, NSN 6695-00-621-7877, and
specifications listed in table 2. The accuracies listed in
is to be used in performing this procedure. Alternate
items may be used by the calibrating activity when the
standard and the TI.
5. Accessories Required. The accessories listed in
equipment listed in table 2 is not available. The items
3
