Electro-Metrics EM-2115, Instruction Manual

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EM-2115 APPENDIX A DESCRIPTION FRONT PANEL CONTROLS
(EM2115A-5)
2) Single: Widest bandwidth, typical sweep time--30 seconds.
A-5.5 Marker Switch
Type: Momentary pushbutton switch.
Indicator: LED, integrated into switch.
Color: Red.
Function: To activate the marker function for use with the spectrum display on an
external oscilloscope.
The marker function is only activated in the Full Band mode of the Scan Width
Switch and corresponds to the tuned frequency of the receiver. The marker ap-
pears as a notch on the spectrum display at the tuned frequency of the receiver.
A-6.0 Bandwidth Switch
Type: Momentary pushbutton switch.
Indicator: None.
Function: To select one of five IF bandwidths (6 dB): 200 Hz, 1 kHz, 9/10 kHz,
100/120 kHz, and 1 MHz depending upon the frequency range selected. Only
three bandwidths are accessible for any one frequency range. Refer to the follow-
ing chart for assignment.
Frequency Range IF Bandwidth Available
Narrow Medium Wide
1-7 (0.09-2.4 MHz) 200 Hz 1 kHz 9/10 kHz
8-10 (2.4-30 MHz) 1 kHz 9/10 kHz 100 kHz
11-15 (20-1000 MHz) 10 kHz 100/120 kHz 1 MHz
The IF bandwidths (200 Hz, 9 kHz, 120 kHz) used in conjunction with the Quasi-
Peak detector for CISPR measurements are marked in "ORANGE". The indicator
for the Quasi-Peak detector will flash if the receiver is not set to the correct IF
bandwidth for CISPR Quasi-Peak measurements.
A-6.1 Bandwidth Indicators
Type: LED.
Color: Red.
Function: To indicate the activated IF bandwidth.