TTi PFM1300 Handheld Frequency Counter 5Hz - 1300 MHz

Description

The
PFM1300
is a highly compact battery powered frequency counter which offers the convenience of a hand-held multimeter. Surprisingly, however, its performance exceeds that of many bench top counters of much higher cost.
Despite its compact dimensions, the PFM1300 incorporates an 8 digit liquid crystal display of the size you would expect to find on a bench top instrument. A full range of annunciators provide indication of measurement function, measurement time, overflow, trigger activity, low battery, and the measurement units.
The PFM1300 can measure frequencies in the range 5 Hz to 1300 MHz.
Input A’s frequency range is 5Hz –25 MHz and has an input impedance of 1 M ohm. Input B’s frequency range is 20MHz – 1.3 GHz and has an input impedance of 50 ohms.
Unlike many counters, the sensitivity is high across the whole frequency range with no dead spots. A low pass filter can be selected to reduce high frequency signal noise and ensure stable readings at lower frequencies.
Despite its wide frequency range, the PFM1300 has a remarkably low power consumption enabling it to operate for approximately 12 hours from a 9 volt battery. A push-to-measure capability gives a virtually instantaneous reading followed by an automatic power down after 15 seconds. This provides  battery life where continuous monitoring of the signal is not required.
The PFM1300 uses a reciprocal frequency counting technique which involves multiple period measurements followed by computation of the reciprocal. The system yields at least 7 digits of resolution per second of measurement time and can measure low frequencies to a resolution of 0.0001 MHz.
The PFM1300 can display signals in terms of period as an alternative to frequencies up to 25MHz. A Hold button allows readings to be frozen on the display for measuring non continuous signals or recording results later.
Input A specifications
5 Hz to 25 MHz.
1 Mohm/25 pF, AC coupled.
Resolution 0.0001 MHz to 10 Hz.
Accuracy +-(1 digit + timebase accuracy).
Sensitivity sinewave 15 mV rms, 10 Hz to 20 MHz.
Maximum input 30v rms, reducing to 1v rms above 1 MHz.
Period measurement available, measurement time 0.1, 1, or 10 seconds.
Input B specifications
20 MHz to 1.3 GHz.
50 ohms nominal.
Resolution 1 Hz to 1 kHz.
Accuracy +-(1 digit + timebase accuracy).
Sensitivity 10 mV rms 20 MHz to 700 MHz, 50 mV rms to 1.3 GHz.
Maximum input 30v rms, reducing to 1v rms above 20 MHz.
Powered by a 9v alkaline battery, with a life of about 12 hours.
'Bat' display indicates that 10% of battery life remains.
Push-to-measure function extends battery life by switching off the instrumentafter 15 seconds.
Shipped via USPS Priority mail.