TM 11-6625-3053-14
b.
Output
1. Power
+10 dBm to-127 dBm
2. Attenuator Accuracy
+/-2 dB (0 to -127 dBm)
3. Impedance
50 ohms nominal
4. SWR
<2
5. Auxiliary
<-6 dBm
6. Leveled Variation
<+/-0.75 dB(0 to-127 dBm)
7. RF Power Accuracy
Attenuator Accuracy + Leveled Variation (0 to -127 dBm)
c.
Modulation, External
1. AM
a.
DC to 1 MHz
b.
Depth
0 to 90%
2. FM
a.
DC to 100 KHz
b.
Deviation
DC to 1 MHz
3. Pulse (PM)
a.
Pulse/Second (PPS)
50 Hz to 50 KHz
b.
Rise Time
<2 microseconds from 10% to 90% of Pulse Amplitude
c.
Fall Time
<3.5 microseconds from 10% to 90% of Pulse
d.
On/Off Ratio
>20 dB
d.
Modulation, Internal Square
950 to 1050 Hz continuously variable duty cycle-45% to
Wave
55% Max
e.
<-30 dB below carrier
f.
Power Input
1. Voltage
115/230
2. Frequency
50/60
3. Watts
150
g.
Rack Mountable
1-14.
SAFETY, CARE & HANDLING.
The AN/USM-213B is a precision electronic instrument and must be handled as such.
a. Avoid electrical shock.
Always follow recommended operating procedures (see para 2-5)
Always use the correct 3-wire power cord which grounds front panel, chassis, and cover at all times.
Never operate the equipment without its protective dust cover.
Always make sure equipment is dry.
b.
Maintain properly.
Pay particular attention to performing equipment Preventive Maintenance Checks and Services
(PMCS) (Chapter 2, Section II).
Keep equipment clean at all times.
Keep accessories and this manual together in a safe place.
If equipment is rack mounted, make sure it is securely fastened.
c.
Handle carefully.
When lifting or moving instrument, always have a firm grip on one of the front panel handles, with the
other hand around the opposite rear side of the case.
Never drop instrument abruptly or subject it to unnecessary jarring or physical shock.
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