520 kHz to 5.1 MHz
A third generation of precision survery instrumentation for direct measurement of the electromagnetic field strength.
The PI-4100 was designed to become the successor to the industry standard FIM- 41 and to provide the accuracy and reliability that the international engineering community, government regulators, and broadcast licensees have depended on for more than a generation.
Various I/O ports have been provided to enhance the versatility of the instrument and to perform certain operational tasks such as battery recharge and computer data exchange.
The PI 4100 is Potomac’s third generation of precision survey instrumentation intended for the direct measurement of electromagnetic field strength in the 520 kHz to 5.1 MHz frequency spectrum. This instrument combines a laboratory quality radio frequency voltmeter, a calibrated, Balanced Loop antenna, an internal GPS receiver, an internal calibration source, and data acquisition hardware and software in a single rugged package weighing less than 3 kg.
This device is equipped with an embedded microcontroller engine that obtains measurement data from the various transducers within the instrument and formats that data for display and, at the option of the use, stores it to memory.
* US National Institute of Standards and Technology
|PI 4100 SPECIFICATIONS|
|Field Strength Meter|
|Frequency Range||520 kHz to 5.1 MHz, calibrated|
|Field Strength Range||22 µV/M to 50 V/M (27 dBuV/m)
to 154 dBuV/m)
|Measurement Uncertainty||3.0% (±0.3 dB) referenced to NIST*, standard field|
Adjacent Channel Rejection
>85 dB at ±9 kHz
|Minimum Frequency Step||1.0 kHz|
| Self generated 2nd &
|<-85 dBc (carrier F/S <10 V/M,
from 530 to 1700 kHz)
|Antenna Type||Balanced, multiturn Loop (removeable)|
| Electrical specifications
|RF Signal is applied directly to RF In BNC|
|Measurement Units||µV-mV-V; mV only; dBuV/m|
|Center Frequency Range||520 kHz to 5.1 MHz|
|Frequency Span||±63 kHz, ±22 kHz|
|Resolution Bandwidth||1 kHz|
|Data Storage & Retrieval|
|Measurement Points||250 max.|
|Download Software||PI Proprietary (Microsoft Excel®
|Download Format||ASCII: Comma Delimited|
|Headphone Jack||3.5 mm Stereo Audio Jack|
| Battery Charging Jack
|2.1 mm Power Jack (Switchcraft 722A
|Data output / Control Input Jack||USB Type B (for bi-directional computer interface)|
|Jack||BNC (provides for calibration by a
3rd party cal. lab.)
|External RF Input Jack||BNC (input impedance 1890 ohm +12pF) provides for antenna
|External RF Output Jack||BNC (50 ohms) RF output is proportional
to Field Strength
|Batteries (AA cells, six required)||Rechargeable; NiMH (supplied)
(can also use 1.5V: Alkaline or Lithium)
|Battery Life||5 Hrs. Minimum before Recharge (NiMH)|
|Battery Recharge Time||3 to 4 Hours|
| Operating Temperature
|-15°C to +50°C (+5°F to +130°F)|
|Dimensions cm (inches)||38x18x28 cm (15x7x11 in.)|
|Weight kg (lbs.)||2.5 (5.5)|
* Specifications subject to change without notice.