TB 9-6625-2237-24
Table 1. Calibration Description - Continued
Test instrument parameters
Performance specifications
Power measurement
Frequency range: 243.0 and 282.8 MHz
Power range: 82.5 mW (19.16 dBm)
Accuracy: 10 mW (0.5 dB)
Range: 70%
Percent modulation
Accuracy: 10% modulation
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-287 and AN/GSM-705. Alternate items may be used by the
calibrating activity. The items selected must be verified to perform satisfactorily prior to
use and must bear evidence of current calibration. The equipment must meet or exceed the
to-one ratio between the standard and TI.
paragraph 4 above and are used in this calibration procedure. When necessary, these items
may be substituted by equivalent items, unless specifically prohibited.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
MEASURING RECEIVER
Frequency range: 242.997 to 282.804
Measuring receiver system
Frequency accuracy: 0.0003%
N5530S consisting of:
Spectrum Analyzer, Agilent
Untuned power range: -9.2 to +19.6 dBm
Model E4440A (E4440A),
Tuned power range: -80.9 to -88.9 dBm
Power meter, Agilent Model
Attenuator accuracy: 0.025/10 dB
E4419B (E4419B), and Sensor
module, Agilent Model N5532A
opt. 504 (504)
Range: 140 mV to 13.5 V dc
Hewlett-Packard, Model 3458A
Accuracy: 0.1% V dc
(3458A)
Range: 667 to 2000 S 3 V p-p
Agilent, OS-303/G (OS-303/G)
Accuracy: 3%
SIGNAL GENERATOR
Range: 243 to 282.8 MHz
Aeroflex, Model 2023B (2023B)
Power range: 15 to 19.6 dBm
or (SG-1207/U)
Modulation: 60%, 70%, and 80% at 1 kHz
Accuracy : 1.0%
VSWR BRIDGE
Frequency range: 243.0 to 282.8 MHz
Wiltron, Model 60NF50-
Directivity: 40 dB minimum
SC3522 (7916686)
