XHT-M04 · FIELD TEST INSTRUMENTS
Optical Light Source
Stable CW and modulated sources for insertion-loss testing with an optical power meter.
3 models · handheld / full-screen multifunction · SM, MM, MS and PON wavelength options · MOQ 1
An optical light source launches a known, stable power level; paired with an optical power meter at the far end, it measures insertion loss across the link. The range covers a compact basic source, a performance handheld source with the best long-term stability, and a 4.3 in full-screen multifunction source that also tests CAT5/6 copper. All models support CW and 270 Hz / 1 kHz / 2 kHz modulation for source identification, and a 2.5 mm universal interface with an optional 1.25 mm LC adapter. Choose SM for single-mode, MM for multimode, MS for both, and PON for 1310/1490/1550 networks.
Model Lineup
Select the wavelength version, connect the source at one end and a power meter at the other, set the meter reference, then read insertion loss in dB. Specifications below are stated per model.
Handheld Sources XHT-M04-B & XHT-M04-P
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Compact basic light source XHT-M04-B
Pocket-size 180 g, AAA cells, removable silicone boot.
Best-fit: routine FTTH turn-up and short spot checks, quick activation and maintenance with a pocket-size 180 g tool; the simple, budget source for short-duration tests where minimum carry weight matters.
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| Wavelength options | SM 1310/1550 · MM 850/1300 · PON 1310/1490/1550 nm |
| Output power | ≥−5 dBm |
| Output stability | ±0.05 dB / 15 min; ±0.8 dB / 8 h |
| Modulation | CW / 270 Hz / 1 kHz / 2 kHz |
| Optical connector | 2.5 mm universal (SC/ST/FC); 1.25 mm LC adapter optional |
| Power supply | 2×AAA (1.5 V) alkaline |
| Display | LCD |
| Dimensions | 130 mm (W) × 35 mm (D) × 65 mm (H) |
| Weight | 180 g |
| Protection | Removable silicone boot, shock & drop resistant |
| MOQ | 1 pc |
| Reference lead time | 5 days |
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Performance handheld light source XHT-M04-P
Best 8-hour stability, full SM/MM/MS/PON matrix, removable silicone boot.
Best-fit: professional installation and acceptance with the best long-term stability (±0.1 dB / 8 h) and the complete SM/MM/MS/PON wavelength matrix; the everyday main instrument for field technicians doing extended, accurate loss tests.
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| Wavelength options | SM 1310/1550 · MM 850/1300 · MS 850/1300/1310/1550 · PON 1310/1490/1550 nm |
| Output power | ≥−5 dBm |
| Output stability | ±0.05 dB / 15 min; ±0.1 dB / 8 h |
| Modulation | CW / 270 Hz / 1 kHz / 2 kHz |
| Optical connector | SC + 2.5 mm universal (SC/ST/FC); 1.25 mm LC adapter optional |
| Power supply | 3×AA (1.5 V) alkaline |
| Display | LCD |
| Dimensions | 160 mm (W) × 85 mm (D) × 45 mm (H) |
| Weight | 220 g |
| Protection | Removable silicone boot, shock & drop resistant |
| MOQ | 1 pc |
| Reference lead time | 5 days |
Full-Screen Multifunction Source XHT-M04-M
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Full-screen multifunction light source XHT-M04-M
4.3 in color screen, fiber plus CAT5/6 network test, 8 languages.
Best-fit: formal acceptance, documentation, training and demonstration on a 4.3 in color screen; combines fiber loss testing with built-in CAT5/6 copper network testing, with 8 languages and long battery life for supervisors and acceptance teams.
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| Wavelength options | SM 1310/1550 · MM 850/1300 · MS 850/1300/1310/1550 · PON 1310/1490/1550 nm |
| Spectral width | ≤5 nm (SM lasers) |
| Output power | ≥−1 dBm |
| Output stability | ±0.05 dB / 15 min; ±0.2 dB / 8 h |
| Modulation | CW / 270 Hz / 1 kHz / 2 kHz |
| Display | 4.3 in color LCD |
| Optical connector | FC/UPC (SC/UPC optional) |
| Network test | Built-in CAT5/CAT6 wire mapping (line mapping) up to 300 m |
| Languages | English, Chinese, Spanish, French, Portuguese, Russian, Thai, Korean |
| LED light | Built-in, >15000 mcd |
| Interfaces | DC charge, USB 2.0, RJ45 |
| Power supply | 3.7 V 5000 mAh Li-ion (≥18.5 Wh), 5 V/3 A adapter |
| Auto power-off | 10 min |
| Operating temperature | −10~+50 °C |
| Dimensions / weight | 179 mm (W) × 112 mm (H) × 48 mm (D); 0.6 kg |
| Protection | Rubber shock-absorbing frame, drop resistant |
| MOQ | 1 pc |
| Reference lead time | 5 days |
FAQ
Q1. Which wavelength version do I need? SM 1310/1550 for single-mode fiber, MM 850/1300 for multimode, MS 850/1300/1310/1550 when both fiber types are installed, and PON 1310/1490/1550 for PON networks. The basic XHT-M04-B is offered in SM/MM/PON; XHT-M04-P and XHT-M04-M add the MS version.
Q2. How is insertion loss measured? Connect the source at one end of the link and an optical power meter at the other. Set the meter to the matching wavelength, store the launch level with REF, and read the link loss directly in dB. CW provides continuous light; 270 Hz / 1 kHz / 2 kHz modulation lets a detector identify the source among multiple fibers.
Q3. What is the difference between the three models? XHT-M04-B is a compact 180 g source for short spot checks; XHT-M04-P adds the best 8-hour stability (±0.1 dB / 8 h) and the full SM/MM/MS/PON matrix for everyday professional use; XHT-M04-M is a 4.3 in color-screen unit that also tests CAT5/6 copper, with 8 languages and long battery life.
Q4. MOQ and lead time? MOQ 1 for all models. Reference lead time is 5 days. Optional adapters and volume orders are arranged on request.
Ordering
• Part number: XHT-M04-[B/P/M]-[SM/MM/MS/PON] — B compact basic (SM/MM/PON), P performance handheld (SM/MM/MS/PON), M full-screen multifunction (SM/MM/MS/PON).
• MOQ 1 for all models. Reference lead time 5 days. The 1.25 mm LC adapter (handheld models) and SC/UPC adapter (XHT-M04-M) are arranged on request, along with bulk orders.
• Orders are checked against the confirmed model and wavelength before packing; response within 24 h.
To recommend the correct source: tell us the fiber type (single-mode, multimode, both or PON), the test duration (short spot checks vs extended acceptance), and whether a color screen or CAT5/6 copper test is required.
Related Products
• Optical power meter (paired with a source for loss) → XHT-M01
• Optical multimeter, integrated source + power meter → XHT-M12
• Live XGS-PON power meter (1270/1577) → XHT-M02
• Visual fault locator → XHT-M03
• Fiber optic test master kit → XHT-M08
