T70/T150 Operation and Maintenance Alignment Procedure be used to align the ce. Normally, 11 ar repairing, e following procedures r for optimum perv alignment will only be require replacing or re-adj doa sting components. Reference oscillator calibration may be required idyllically dus to crystal aging. The aging should be than 1 ppm/year Standard Test Conditions AF Signal Generator S00 Ohms output impedance Frequency range, 50 to 3000 Hz Level, 387 mV rms to the line input Power Supply 13.8 Vde 5A max.
T70/T150 Operation and Maintenance Reference Oscillator Calibration Step 2 input Key the transmitter on center frequency channel, Audio input OFF. Modulation Balance Step 3 wr RE Technology Pty. Ltd. input Set RV3 fully COW. Sel RV fully CW. Sal RV2 mid way. Set JP4 for Hi-Z input Set JP7 for flat response. 100 Hz 387 mV to the Hi-Z input. Key the transmitter. 1000 Hz 387 mV to the Hi-Z input Key the transmitter. Return JP7 to per-ephasis.
T70/T150 ~ Operation and Maintenance Deviation Step Input g 1 kHz 387 mV ta the line input Set RV4 fully CW. Key the transmitter. Line input Level Step Input 10a 1 kHz 387 mV or test signal from ling to the line input Key the transmitter 0b 4 kHz 3B7 mV oor test signal from fine to the fine input Output Power Step Input 11 None require Measure FM deviation deviation Audio Voltage Test pin gio pin 1 Measure RF power at coax connector Stadium RV1 for maximum system deviation, (2.
T7OT180 « Operation and Maintenance 1. Specifications 1.4 Description The transmitter is a 5-25 watt output, frequency synthesized, narrow band FM unit which is normally used to drive a high power amplifier, It oan also be used alone In lower power applications. The pulp power is nominally 25 Watts but can be preset between 5 and 25 watts. All necessary control and 600 ohm line interface circuitry is included. 1.1.
TATTOOIST « Operation and Maintenance 2. Front Panel Controls, Indicators and Test Points 2.1 2.2 2.3 Controls Transmitter Key Momentary Contact Push Button Line Input Level screwdriver adjust multi-turn pot indicators Power ON Green LED Tx Indicator Yellow LED Fault Indicator Flashing Red LED External ALC Green LED External Reference Green LED Test Points Line Input 1 + Gnd. Forward Power « 1 + Gnd, Reverse Power 1 + Gnd. Tuning Voltage 1+ Gnd, Serial Data (R-232) 2 + gnd 3.
33 3.4 3.5 T70/T150 « Operation and Maintenance Frequency Synthesizer Step Size ~ 6.0 KHz or 8.26 KHz Frequency Stability +f& ppm over Standard Number of Channels 100 channels numbered Nominal Antenna impedance 50 Ohms 3,7 Output power 37 3.8 3.9 3.10 5-25 Watts Transmit Duty Cycle 100% to 40 deg. C. Spurious and Harmonics techs than 0.25 uW Carrier and Modulation Attack Time Less than 20 m Sec. Modulation 3.10.1 Type Two point direct FM with optional per-srmphasis 3.10.
T70IT150 « Operation and Maintenance 3.10.4 Residual Modulation and Noise The residual modulation and noise in the range 300 to 3000 Mz is typically less then 50 dB referenced to rated system deviation. 3.41 600 Ohm Line Audio Input Level Adjustable from -30 {0 +10 dBm 3.12 HZ Input 3.12.1 impedance 10 K Ohms Nominal, balanced input 3.12.3 Input Level 2E5mVio Arms 3.13 Test Microphone Input 200 Chm dynamic with PTT 3.14 External Tone Input Compatible with R180 tore output 3.
TTO/T1580 Operation and Maintenance 3.48 DC Remote Keying An opt-coupler input is provided to enable dc loop keying over balanced lines or local connections. The circular can be connected to operate through the 800 Ohm line or through a separate isolated pair. 318 CSS CSS tones can be provided by an internal encoder or by an external source connected to the external tong input. The internal CSS encoding is provided by a hybrid module. Iris provides programmable encoding of all EIA (ones. 3.18.
T70/T150 Operation and Maintenance 3.20.1 Repeater Hang Time A short delay or "Hang Time" can be programmed to be added to the end of transmissions. This is usually used in talk through repeater applications to prevent the repeater from dropping out between mobile {transmissions. The Hang Time can be individually set on each channel for 0-15 seconds. 3.20.
