MNS-4000 400-Channel Tracking Receiver

The L.L. Electronics MNS-4000 is our wide-range handheld tracking receiver for users who want extensive frequency coverage without unnecessary complexity. Each receiver provides 400 channels across a 4 MHz frequency span, giving you the flexibility to track a large number of transmitter frequencies while retaining the straightforward controls and dependable operation our receivers are known for.

Each channel covers 10 kHz, with the Tune control allowing you to precisely zero in on the transmitter frequency within that channel.

216–220 MHz is by far our most common configuration, but the MNS-4000 can be built for other supported radio-tracking frequency ranges as well.

Built for Tracking, Not Complexity

The MNS-4000 is intentionally straightforward. Select the appropriate channel, fine-tune the signal, and use the Gain control to manage both signal strength and audio level.

Rather than requiring separate attenuation controls or complicated menus, the Gain control allows you to progressively reduce sensitivity as you close in on the transmitter. This makes it easy to transition from searching at long range to accurately determining direction at close range.

400 Channels. 4 MHz of Coverage.

The MNS-4000 provides:

• 400 selectable channels

• 10 kHz per channel

• 4,000 kHz / 4 MHz total coverage

• Fine tuning within each channel

• Coverage approximately 216.000–219.999 MHz

For example, a transmitter operating at 216.175 MHz is located on Channel 617, with the Tune control set near 5. Fine tuning allows for the small amount of frequency variation that can occur between individual transmitters or with changing environmental conditions.

Choose Your Frequency Range

Every MNS-4000 is configured for the frequency range you need.

216–220 MHz is the most common radio-tracking range we supply, but configurations are also available for other commonly used tracking bands from approximately 148 MHz through 438 MHz.

Because each MNS-4000 covers a 4 MHz span, customers using less common frequencies should provide the frequencies of the transmitters they need to track. We can confirm compatibility and configure the appropriate receiver range before building the unit.

Dual-Function Signal Meter

The analog meter is much more than a simple signal indicator.

At closer range, meter movement provides an extremely useful visual indication of signal strength and direction. At longer distances, the receiver's audio can often provide the clearest indication of small changes in signal as the antenna is swept from side to side.

The MNS-4000 includes our Dual Function Meter as standard equipment:

Meter Light
Turns on the green meter backlight for easier visibility in low-light conditions.

Battery Test
Momentarily displays receiver battery condition directly on the meter.

2L Folding Directional Antenna

The current MNS-4000 package is paired with our 2L Folding Directional Antenna.

This compact two-element design was developed specifically around our receivers. It provides the directional response needed for tracking while eliminating the bulk of older multi-element antenna designs. The antenna folds alongside the receiver for transport and opens quickly when needed.

It is lightweight, comfortable to use in one hand, and mounts directly with the receiver to create one integrated tracking unit.

Tracking by Meter and Audio

The receiver gives you two complementary ways to determine direction.

At closer range: reduce the Gain and watch the meter. Meter movement makes small changes in signal strength easier to distinguish when the transmitter is nearby.

At longer range: increase the Gain and listen to the signal while slowly sweeping the antenna. A relatively small change in antenna direction can produce a noticeable drop in audio, helping identify the strongest direction.

The orientation of the transmitter antenna also matters. If a weak signal is difficult to locate, try holding the receiver antenna both vertically and horizontally. Matching the polarization of the transmitter antenna can significantly improve reception, particularly at greater distances.

Straightforward Controls

Channel Selector
Selects one of 400 receiver channels.

Tune
Fine-tunes the receiver within the selected 10 kHz channel.

Gain
Controls receiver sensitivity, attenuation, and audio level as you approach or move away from the signal.

Signal Meter
Provides visual signal-strength indication for directional tracking.

Meter Light / Battery Test
Provides a green meter backlight and momentary battery-condition check.

Headphone Jack
Standard headphone connection for private listening or difficult field conditions.

Your MNS-4000 setup includes:

• MNS-4000 Receiver

• 2L Folding Directional Antenna

• Receiver-to-antenna cable

• Two receiver batteries

• Operating instructions

*** Receiver Lead Time: Due to strong demand, we are currently experiencing extended lead times on receiver orders. We build and test each receiver before shipment and appreciate your patience. ***