리퍼비시 계측기
리퍼비시 계측기
The TF2304 FM/AM Modulation Meter has been designed primarily for the servicing and production line testing of mobile radio transmitters. The RF sensitivity is better than 50 mV up to 600MHz and better than 100 mV up to 1GHz. The IF output frequency is 400kHz nominal. RF level control is automatic. Panel indicators light up when input is outside the high or low limits of the range. Automatic Tuning Over Carrier Frequency Ranges 9 to 12.5MHz and 18 to 1000MHz On FM Transmitters, peak deviation can be made from 1.5kHz to 150kHz over the modulation frequency range of 50Hz to 9kHz. Depth Measurements up to 95% possible on AM transmitters, between 50Hz and 9kHz at carrier frequencies up to 400MHz.
FM/AM Modulation Meter
• Automatic Operation
• Carrier Frequency Range: 9 to 12.5 MHz and 18 to 1000 MHz
• FM Deviation in Eight Ranges: 1.5 to 150 kHz FSD
• AM Depth in Three Ranges: 10, 30 and 100%
• Input Level Indication
• AC Supply and Rechargeable Battery Option
Specifications
RF input
• Carrier Frequency Range: 9 to 12.5MHz and 18 to 1000MHz with automatic tuning
and automatic level setting. Maximum time to reading: approximately 5 s
• Sensitivity: Better than 50mV up to 600MHz, better than 100mV up to 1000MHz
• Maximum Working Input: 1V RMS extending to 7V with switchable 20 dB nominal pad
• Maximum Safe Input: 1W (7V into 50 ohm) continuous
• Switchable Attenuator: 20 dB nominal
• Input Impedance: 50 ohm nominal
• Level Indication: Two LED lamps indicate if the input level is too low or too high
Frequency Modulation
• Deviation Ranges: Eight ranges (using x2 and x10 switches) giving full scale peak deviations of 1.5, 3, 5, 10, 15, 30, 50 and 150 kHz. Positive or negative deviation indication is selected by a switch
• Modulation Frequency Range: Over the range 50Hz to 9kHz
Amplitude Modulation
• Modulation Depth Range: Full scale indication 10%, 30% and 100% (usable up to
95%). Peak or trough indication selected by a switch
• Modulation Frequency Range: Over the range 50Hz to 9kHz
IF Output
• Frequency
• Level: 100mV EMF nominal from 1kohm source
AF Output
Demodulated AF output available at front panel socket
• Level: 1mW nominal into 600 ohm with meter at FSD
• 3 dB bandwidth: Nominally 20Hz to 15kHz
Connectors
BNC sockets for RF input, IF output and AF output
