Telephone HD-988 technical specifications
YDC-988-2 multi-function telephone detector is designed with foreign advanced technology and imported integrated circuit as the core. It is designed for the manufacture, sale and maintenance of various telephone, sub-machine, fax and other telephone communication equipment. The comprehensive test instrument is accurate, fast and simple to test. The instrument has high integration degree, many functions, high reliability and easy to use. It is widely used in post and telecommunications, communication equipment manufacturers, telephone sales and repair centers and other departments. It can also be used for internal dialogues in units or homes. The instrument is compact and reasonable in structure, easy to operate, safe and reliable in use.
1, telephone feeder voltage: 48VCD ± 5% 2, pulse dial test: pulse dialing interval ≥ 150ms. Pulse ten numbers (1, 2, 3, 4, 5, 6, 7, 8, 9, 0). 3, dual-tone multi-frequency dial test: standard frequency combination: 2Hz ± 1.5%, a total of sixteen codes. The total level range can be received: -20 - 0dBm. Receiveable signal duration: minimum 40ms. Receiveable signal interval: minimum 40ms. 4. Ringing test: Ringing signal strength: AC 75V, frequency 50Hz, the meter indicates the ringing voltage value. Ringing signal form: continuous. 5. Transmit test: The level meter indicates the transmission strength: full scale: 0dBm ± 1dBm. (600Ω). 6, receiving test: provide dial tone: 450Hz sine wave, intensity: (15dBm ± 1dBm). Form: Continuous output dial tone. 7. Two-way paging intercom test: It can be connected to the auxiliary telephone intercom, simulate the call status, and has two-way ringing function. 8. Alarm system: The loop indication ring light indicates the intermittent state of the loop. The switch indicator light indicates the power on and off status. The meter indicates the feed voltage. 9, the power supply AC 220V ± 10%, 50 / 60Hz power consumption is less than 8W. 10. Dimensions: 75mm (H) × 202mm (W) × 220mm (D). 11, weight: 1KG. 12. Working conditions: Ambient temperature: 0-+40 °C. Relative humidity: <90%. Beijing Heng Aode Instrument Co., Ltd. Contact: Wang Rui (Ms.)
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