Selective Level Meter for Broadband Measurement
SPM-101
This is a meter that can measure the overall transmission characteristics of a variety of carrier telephone equipment and communication devices over a frequency range of 20 Hz to 6.4 MHz.
Collectively integrating the oscillator and selective level meter unit, SPM-101 can be used for measurement by switching its selective filters with bandwidths (BW) of 6 Hz, 70 Hz, and 3.1 kHz.
Equipment Category
Selective level meter
Power supply
AC adaptor
Introduction of an analog type meter
The displays of the level meter unit comprise of an analog and a digital meter, thus allowing the visual check of input signal level fluctuations.
Equipped with a signal search function
Demonstrates its strong capabilities to search unknown signals.
Equipped with both the selective level meter unit and oscillator unit
Under development. It enables distortion measurement by setting different frequencies for both units as well as measurement by interlocking their frequencies.
Powered by 100 V AC only.
Configuration example
Main Specifications
| Item | Specifications | |||||
| Selective filter types | FLAT | 6Hz | 70Hz | 3.1kHz | ||
| Selective level meter unit | Input level range | 75 Ω (unbalanced) | -60 ～ +40dBm | -100 ～ +40dBm | -100 ～ +40dBm | -100 ～ +40dBm |
| 75 Ω (balanced) | -60 ～ +30dBm | -100 ～ +30dBm | -100 ～ +30dBm | -100 ～ +30dBm | ||
| 135 Ω (balanced) | ||||||
| 150 Ω (balanced) | ||||||
| 600 Ω (balanced) | ||||||
| Frequency range | 75 Ω (unbalanced) | 20Hz ～6.4MHz | 20Hz ～6.4MHz | 200Hz ～6.4MHz | 10kHz～6.4MHz | |
| 75 Ω (balanced) | 4kHz～ 2MHz | 4kHz～ 2MHz | 4kHz～ 2MHz | 10kHz～ 2MHz | ||
| 135 Ω (balanced) | ||||||
| 150 Ω (balanced) | ||||||
| 600 Ω (balanced) | 100Hz～150kHz | 100Hz～150kHz | 200Hz～150kHz | 10kHz～150kHz | ||
| Input impedance | 75 Ω (unbalanced)/HIGH 75 Ω, 135 Ω, 150 Ω, 600 Ω (balanced)/HIGH |
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| Level accuracy | Specified separately | |||||
| SEARCH mode | Provides a function that can search a signal at unknown frequencies. | |||||
| Flat level measurement function | Setting the filter to FLAT allows the operation mode to be switched to the flat level measurement function (flat level meter) | |||||
| Display system | Digital + Analog meter system | |||||
| Oscillator unit | Oscillation frequency range | 75 Ω (unbalanced): 20 Hz to 6.4 MHz | ||||
| 75 Ω (balanced): 4 kHz to 2 MHz | ||||||
| 135 Ω (balanced): 4 kHz to 2 MHz | ||||||
| 150 Ω (balanced): 4 kHz to 2 MHz | ||||||
| 600 Ω (balanced): 100 Hz to 150 kHz | ||||||
| Variable frequency mechanism | Can vary frequencies using the dial switch over all the frequency range in a pseudo continuous manner | |||||
| Frequency display | 7-digit display through LEDs | |||||
| Frequency stability | 1 × 10-5 or lower (at ambient temperatures of 0°C to ＋40°C) | |||||
| Output level range | -60dBm～＋10dBm | |||||
| Output level accuracy | Specified separately | |||||
| Output level frequency characteristics(at 0 dBm) | 75 Ω (unbalanced)/10 kHz Within ±0.5 dB for 20 Hz ≦ f ＜ 200 Hz Within ±0.3 dB for 200 Hz ≦ f ≦ 2 MHz Within ±0.5 dB for 2 MHz ＜f ≦ 6.4 MHz 75 Ω, 135 Ω, 150 Ω (balanced)/10 kHz Within ±0.3 dB for 4 kHz ≦ f ≦ 650 kHz Within ±0.5 dB for 650 kHz ＜f ≦ 2 MHz 600 Ω (balanced)/10 kHz Within ±0.5 dB for 100 Hz ≦ f ＜ 200 Hz Within ±0.3 dB for 200 Hz ≦ f ≦ 150 kHz |
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| Step error | Within ±0.2 dB (at 10 kHz） | |||||
| Output impedance | Within 75 Ω±5％ (unbalanced) Within 75 Ω±5％, within 135 Ω±5％, within 150 Ω±5％, within 600 Ω±5％ (balanced) |
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| Relative harmonic content | -50 dB or lower for both second- and third-order harmonics | |||||
| Others | Power supply | AC100V±10％ | ||||
| Operating temperature and humidity range | Operating temperature: 0°C to +40°C Operating humidity: 15% to 85% (Note: in an environment with no condensation) |
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| Dimensions | W440 × H310 × D150 mm (The projection is not included); D178 mm (when the front cover is attached) | |||||
| Weight | 13 kg or less (accessories not included) | |||||
