PIM Master preventive maintenance consists of cleaning the unit and inspecting and cleaning the RF connectors on the instrument and all RF cables. Clean the PIM Master with a soft, lint‑free cloth slightly dampened with water or water and a mild cleaning solution.
Clean the RF connectors and center pins with a cotton swab dampened with denatured alcohol. Visually inspect the connectors. The pins of the connectors should be unbroken and uniform in appearance. If you are unsure whether the connectors are undamaged, gauge the connectors to confirm that the dimensions are correct.
Visually inspect the test port cables. The test port cable should be uniform in appearance, and not stretched, kinked, dented, or broken.
Calibration Requirements
Anritsu recommends annual calibration and performance verification by local Anritsu service centers.
Verification
Two quick tests can be performed in the field to verify that the PIM Master and the support equipment that you are using in your PIM measurements are all ready for testing. First perform a residual PIM test, then perform a second test that verifies a known PIM standard. Together, these two tests verify that both the Rx and Tx paths of the instrument are functioning properly.
Anritsu recommends testing the residual PIM at least daily using the optional Low PIM Termination (Anritsu part number MA82103A), which has good PIM performance. Do this prior to conducting cellular system tests.
Residual PIM Test:
1. Connect the PIM Master to the Anritsu handheld instrument as shown in Connection Diagram.
2. For PIM Analysis, set the PIM Master (via the Anritsu handheld instrument) as follows:
Residual PIM Test Settings
Model
F1
F2
Power
Test Duration
MW8208A
869 MHz
894 MHz
20 W
20 seconds
MW8209A
925 MHz
960 MHz
20 W
20 seconds
MW8219A
1930 MHz
2140 MHz
20 W
20 seconds
Refer to PIM Analyzer for details on setting the measurement parameters.
3. Connect the Low PIM termination to the PIM Master TEST PORT and make a measurement by pressing the Measurements main menu key, then by pressing the Test submenu key.
The measured result should be better than – 112 dBm ⁄ 155 dBc.
Verification PIM Test:
4. After the residual PIM measurement is complete, connect the PIM standard (refer to Table: PIM Standards) to the Test Port, and connect the Low PIM termination to the PIM standard, and then make another measurement.
The result should be – 80 dBm ⁄ 123 dBc, ± 3 dB.
PIM Standards
Part Number
Use With
Specifications
1091‑403‑R
MW8209A MW8208A
– 80 dBm ± 3 dB at 910 MHz, 2x20 W, 7/16 DIN(m) to 7/16 DIN(f), 50 Ω
1091‑390‑R
MW8219A
– 80 dBm ± 3 dB @ 1775 MHz, 2x20 W, 7/16 DIN(m) to 7/16 DIN(f), 50 Ω
These checks are not calibrations, and no field‑adjustable components are involved. To ensure consistently accurate measurements, the PIM Master must be returned to an authorized service center annually for calibration.
If your PIM Master does not show similar results, contact Anritsu customer service at: