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4-6 CSI-200 User Instructions
8 Repeat for channels 2 through 4 by activating the TALK buttons, connecting to the test points
and adjusting the potentiometers as indicated in Table 4.4.
True Sidetone Adjust
1 Configure the DYN MIC HEADSET jack for stereo mode (See Section 3, “MONO”)
2 Set all front panel buttons to off.
3 Connect 51 ohm load resistors across the left headphone output (J2 pins 3 and 4) and right
headphone output (J2 pins 3 and 5).
4 Connect an AC voltmeter across the left headphone output.
5 Remove the signal generator from the mic input, and connect it across intercom channel 1.
Adjust the generator output to –1 dBu (0.69 VAC), 1 kHz.
6 Activate the CH 1 TALK button, and adjust the CH 1-3 volume control (R1) until you measure
11.2 dBu (2.82 VAC) across the left headphone output.
7 Disconnect the signal generator from intercom channel 1. Adjust the generator for minimum
output, and reconnect it across the DYN MIC HEADSET jack mic input (J2 pins 1 & 2).
Readjust the generator output level to –45 dBu, 1 kHz.
8 Turn on the MIC ON button.
9 Adjust R37 (sidetone) on the MCE325 main board to obtain 8.7 dBu (2.1 VAC) at the left
headphone output.
Level and Frequency Response Check, Intercom Channel to
Headphone
1 Set all front panel buttons to off.
2 Remove the signal generator from the mic input, and reconnect it across intercom channel 1.
3 Adjust the signal generator output to –1 dBu, 1 kHz.
4 Preset the CH 1-3 volume control to the 2 o’clock position.
5 Activate the CH 1 TALK button. The left headphone output level should be 11.2 ±2 dBu (2.2
to 3.6 VAC).
6 Adjust the CH 1-3 volume control to measure 11.2 dBu (2.8 VAC) at the left headphone
output. Check for no distortion or clipping in the output.
7 Adjust the signal generator output to –1 dBu, 100 Hz. The left headphone output should read
10.2 dBu ±2 dBu (1.9 to 3.2 VAC)
8 Adjust the signal generator output to –1 dBu, 10 kHz. The left headphone output should read
7.8 dBu ±2 dBu (1.5 to 2.4 VAC).
9 Repeat the test for channels 2 through 4. For channel 3, continue to use the CH 1-3 volume
control and monitor the left headphone output. For channels 2 and 4, use the CH2-4 volume
control and monitor the right headphone output.
Table 4.4
Channel 1-4 sidetone trimmer adjust.
TALK BUTTON TEST POINT POTENTIOMETER
CH 1 U5 pin 7 R57 (Sidetone 1)
CH 2 U5 pin 1 R73 (Sidetone 2)
CH 3 U7 pin 1 R88 (Sidetone 3)
CH 4 U7 pin 7 R104 (Sidetone 4)
- USER INSTRUCTIONS 1
- PROPRIETARY NOTICE 2
- COPYRIGHT NOTICE 2
- UNPACKING AND INSPECTION 2
- WARRANTY INFORMATION 2
- CUSTOMER SUPPORT 2
- RETURN SHIPPING INSTRUCTIONS 3
- TABLE OF CONTENTS 5
- Operation 3-1 6
- Maintenance 4-1 6
- Parts Lists 5-1 7
- Diagrams 6-1 7
- & S 9
- Front Panel Features 10
- Rear Panel Features 11
- Programming 12
- Mounting Configuration 12
- MCE325 Specifications 13
- MCS325 Specifications 14
- Figure 1.5 15
- Figure 1.3 15
- Figure 1.4 15
- Figure 1.6 16
- Figure 1.7 16
- Figure 1.8 17
- Figure 1.9 17
- Figure 1.10 18
- Figure 1.11 19
- 1-12 MCE325 User Instructions 20
- NSTALLATION 21
- Top cover removal 22
- Table 2.2 23
- Figure 2.2 24
- ISO (DS5) 25
- Remote Talk-off (DS7) 25
- VOX (DS8) 25
- Mechanical Installation 26
- Figure 2.3 27
- Electrical Installation 28
- Program Inputs, J14 and J15 29
- External Speaker, J27 29
- Auxiliary Connector, J22 29
- Remote Microphone Switch 30
- ISO Connection 30
- External Headset 30
- PIN # FUNCTION 31
- Table 2.9 32
- PERATION 33
- Microphone On/Off 34
- Speaker On/Off 34
- Volume Adjustment 34
- Front Panel Programming 35
- 3-4 CSI-200 User Instructions 36
- Instant Mic 37
- 3-6 CSI-200 User Instructions 38
- AINTENANCE 39
- Cleaning 40
- Test Equipment 40
- Power Supply Test 40
- Initial Configuration 41
- Keying Output Test 41
- Four-Channel, Two-Wire Mode 42
- Two-Channel, Four-Wire Mode 43
- True Sidetone Adjust 44
- Headphone 44
- Program A to Left Headphone 45
- IFB Test 46
- Panel Mic to Channel Test 48
- Carbon Mic to Channel Test 48
- VOX Test 48
- Mic Kill Receive Test 48
- Mic Kill Transmit Test 49
- Call Transmit Test 49
- Call Receive Test 49
- ISO Test 50
- Remote Mic Switch Test 50
- Program Lockout Test 50
- Noise Checks 50
- CSI-200 User Instructions 52
- Table 5.1 53
- Table 5.2 53
- Table 5.3 54
- Table 5.4 55
- Table 5.5 55
- Table 5.6 55
- Table 5.7 65
- S ECTION 67
- 6-2 CSI-200 User Instructions 68
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- TELETELEXX 82
- 9027624501 83
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