YAESU PB-1667 Pone Patch Speaker Instruction Manual

YAESU PB-1667 Pone Patch Speaker

GENERAL

The YAESU Landline Phone Patch/Speaker, model SP-901P, is designed to be used with the FT-902 series of all-mode HF transceivers, providing hybrid phone patch operation as well as an external speaker unit. All the operating controls are conveniently located on the front panel of the compact housing, which matches the FT-902 series in styling. Jacks are provided on the rear panel for making the necessary external connections.

INSTALLATION

Installation of this unit consists of connecting the telephone line to the jack marked LINE, and making the other interconnections shown in the drawings.

OPERATION

Front Panel Controls

1. PATCH Switch
   In the “ON” position, the hybrid circuit is connected to the phone lines and the transceiver is ready for phone patch operation. The built-in speaker is disconnected. When this switch is placed in the “OFF” position, the phone patch is disconnected from the phone lines, and the built-in speaker is connected to the transceiver.

2. METER
   The meter indicates the signal level fed to the phone lines from the transceiver while on receive. The meter also is used to measure the balance for the hybrid circuit, in conjunction with the MONITOR/NULL switch and the
   BALANCE control on the rear panel.

3. RX GAIN Control
   This potentiometer controls the amplitude of the received signal fed to the phone lines.

4. TX GAIN Control
   This potentiometer controls the amplitude of the phone signal fe(5)

5. MONITOR/NULL switch
   This switch is placed in the NULL position while adjusting the balance of the hybrid circuit. It must be in the MONITOR position for phone patch operation. In this position, the meter will indicate the signal level fed to the phone lines from the transceiver.

6. BALANCE control
   This control is used to null the receiver audio output, thus providing isolation between the receiver audio and the microphone input.

7. TRANSMITTER HI-Z
   This jack is used to connect the patch output to the microphone input when using a transceiver of high microphone input impedance.

8. LINE jack
   This jack is used for connection to the telephone lines.

9. RECEIVER
   600 0hm jack This jack is used with receivers of 600-ohm audio output impedance.

10. LOW-Z IN jack
    Through the LOW-Z IN jack, connections for the speaker output and the microphone input of the FT-901 transceiver are accomplished.d to the microphone input of the transceiver.

Manual Phone Patch Operation

Place the PATCH switch in the PATCH posi-tion. Using the local telephone, contact the landline user of the phone patch, and have him or her stand by. While receiving a signal, set the transceiver volume control to the noon position,
and adjust the RX GAIN control for a comfortable level as heard through the telephone. Place the MONITOR/NULL switch in the NULL position, and adjust the BALANCE control for a minimum signal level as indicated on the meter. The RX GAIN control should be set to approximately 3/4 clockwise rotation for this adjustment. Return the switch to the MONITOR position. Have the user at the remote telephone speak in a normal voice. Adjust the TX GAIN control so that the telephone line signal will modulate the transceiver correctly when its MIC GAIN control is set to the noon position.

During manual phone patch operation, the station operator must monitor the conversation, and switch the transceiver manually from transmit to receive via the PTT or MOX mode. Monitoring of the conversation can be made through the telephone in the operating room.C. Voice Controlled Operation (VOX) If the telephone line signal is good, VOX operation can be performed. Proper operation of the VOX will depend on obtaining a good null of the receiver signal as described on the previous page. The depth of this null depends, in turn, on the quality of the telephone lines, and is best when the line impedance is 600 ohms.

If a good null is obtained, the telephone user should speak in a normal voice. Advance the FT-902 VOX GAIN control until the user’s voice activates the transceiver VOX relay. The transceiver should revert to the receive condition when the user stops speaking, and the FT-902 relay holds time control VR 602 should he adjusted for smooth cooperation.

PARTS LIST

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