T H U R L B Y T H A N D A R I N S T R U M E N T S PFM3000 3GHz low-cost high resolution handheld frequency counter tti-test.comPFM3000 3 GHz low-cost high resolution handheld frequency counter 3 Hz to > 3000 MHz in two overlapping ranges Battery operation handheld format with tilt-stand High input sensitivity over the full frequency range Push-to-measure function with auto power-down High impedance measurement up to 125 MHz Large 8+ digit display with full range of annunciators Reciprocal counting technique gives superior resolution Selectable measurement time display hold function Period measurement from 3 Hz to 125 MHz Noise filter for low frequency measurements Wide frequency range and high resolution Large and clear display The PFM3000 offers high sensitivity frequency measurement from 3Hz to Despite its compact dimensions, the PFM3000 incorporates a large 8 digit more than 3GHz in two overlapping ranges. Period measurement is also LCD. Annunciators are provided for measurement function, measurement provided from 8ns to 330ms. time, overflow, trigger activity, low battery, and measurement units. The PFM3000 uses a continuous reciprocal measurement technique to Low power consumption and push-to-measure provide high resolution at all frequencies with rapid update. Despite its wide frequency range the PFM3000 has a power consumption It offers high sensitivity across the whole frequency range. A low pass filter that enables it to operate for many hours from a PP3 size battery. can be selected to reduce high frequency signal noise at lower frequencies. A push-to-measure capability gives an instantaneous reading followed by an automatic power down after 15 seconds. This provides greatly extended battery life where continuous monitoring of the signal is not required. Bench-top use The PFM3000 has the performance needed for many bench-top applications, A and its built-in tilt stand sets the display at a convenient angle. Signal activity indicator MEASUREMENT FUNCTIONS When no input signal is detected the Trig indicator will be off, indicating that no measurement Frequency (Range A) is possible. The gate time indicator flashes until the first measurement interval is complete. Frequency Range: 3Hz to 125MHz -7 Resolution: 10 Hz to 100Hz (see Note) INPUT SPECIFICATIONS Frequency (Range B) Input A Frequency Range: 80MHz to >3000MHz Input Impedance: 1MW//20pF (AC coupled) Resolution: 1Hz to 10kHz (see Note) Frequency Range: <3Hz to >125MHz Period (Range A only) Sensitivity: Sinewave - 15mVrms 10Hz-125MHz Period Range: 8ns to 330ms Input B -7 Resolution: 10 ns to 1us (see Note) Input Impedance: 50W (AC coupled) Measurement Time Frequency Range: <80MHz to >3000MHz Selectable as 10s, 1s or 0.1s. (Note that for the 0.1s setting the effective measurement time Sensitivity: Sinewave - 15mVrms 80MHz-2GHz, 50mVrms to 3GHz is 0.3 seconds). Maximum Input Voltage Resolution Input A and Input B: 30Vdc 30Vrms 50Hz/60Hz reducing to 1Vrms above 1MHz The displayed resolution depends upon the measurement time and the input frequency. Note that the inputs will not be damaged if subjected to an accidental short-term connection to a Eight digits (or nine using an overflow indication) are displayed for a 10s measurement time. 50/60Hz line voltage not exceeding 250V rms. Seven or eight digits are displayed for a 1s measurement time, and six or seven digits for 0.1s depending upon the input frequency. Usable resolution may be further reduced by noise, DISPLAY particularly at low frequencies. No. of Digits: 8 full digits plus overflow indicator for 8.5 digits Accuracy Size of Digits: 11.5mm (0.45) Measurement accuracy is the sum of the timebase accuracy and measurement resolution plus Annunciators: 15 annunciators one count. POWER REQUIREMENTS TIMEBASE Battery Type: 9V PP3 alkaline Crystal Oscillator Frequency: 10MHz Battery Life: Typically 20 hours Initial Oscillator Adjustment Error: 2ppm (closed-case adjustable by user) Low Batt. Indicator: Bat shows in display when approximately 10% of battery life remains Oscillator Temperature Coefficient: Typically less than 0.3ppm/C 18C to 28C, 10ppm 20C to 70C GENERAL Oscillator Ageing Rate: < 5ppm/year Operating Range: +5C to +40C, 20% to 80% RH OPERATING FUNCTIONS Storage Range: -20C to +60C Environmental: Indoor use at altitudes up to 2000m Pollution Degree 2 Press to measure Size: 81mm x 178mm x 30mm (W x L x D) With the power switch off, pressing any of the function select keys will power the instrument Weight: 190gms excluding battery up in the corresponding function. The instrument will automatically switch off 15 seconds Electrical Safety: Complies with EN61010-1 after the last key press. EMC: Complies with EN61326 Hold Pressing the Hold key will stop further measurements being made and the current measured Thurlby Thandar Instruments Ltd. operates a policy of continuous development and reserves the value will remain in the display until the Hold key is pressed again. right to alter specifications without prior notice. Noise filter The Filter key controls a low pass filter, with a cut-off frequency of about 50kHz, to ensure more stable readings at low frequencies. Designed and built in Europe by: Thurlby Thandar Instruments Ltd. Glebe Road, Huntingdon, Cambridgeshire. PE29 7DR United Kingdom Tel: +44 1480 412451 Fax: +44 1480 450409 Email: sales tti-test.com Web: www.tti-test.com Brochure Part No. 82100-1360