Electro-Metrics EM-2115, Instruction Manual

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EM-2115 3.0 PERFORMANCE CHECK
(EM2115S3-3)
3.3.4 Signal Amplitude And Frequency Accuracy
To reduce the risk of error when performing the procedures in Section 3.4., use the fol-
lowing method to determine the amplitude and frequency of the input signal:
a. Tune the signal source and receiver for a maximum indication on the Analog Me-
ter.
b. After the signal is peaked for maximum on the Analog Meter, read the level indi-
cated on the Digital Meter.
c. With the signal peaked for maximum, the frequency of the signal will be indicated
on the Frequency Display with the accuracy specified in Table 1.1.
3.4 Performance Test Procedures
3.4.1 CW Voltage Accuracy
Specification: ±2.0 dB
Equipment required: Signal Generator
This test procedure is performed at three test frequencies per
frequency range selected using the method described in para-
graph 3.3.3.
a. Set the front panel controls as follows:
DETECTOR ...................................................AVERAGE.
BANDWIDTH ...............................................Narrowest position of the frequency
range selected.
ATTENUATION ...........................................40 dB.
FREQUENCY RANGE .................................0.009-0.035 MHz.
SAMPLE TIME Control ................................Mid-range.
b. Set the receiver for the first test frequency selected and initiate the calibration se-
quence by pushing the front panel CAL Switch. The UNCAL indicator will be
lighted for the duration of the calibration sequence (approximately 2-3 seconds). If
the UNCAL indicator remains lighted beyond 3 seconds or the receiver does not
calibrate, there may be a fault within the calibration circuitry. Contact Electro-
Metrics for any assistance required.
NOTE: The receiver will not calibrate if the Scan Mode Switch is set
to either Continuous or Single.
c. Apply a CW signal at an input level of +40 dB(µV) at the test frequency selected
to RF Input of the EM-2115.