Yupiteru MVT-7100 User Manual

Yupiteru MVT-7100

Owner’s Guide

Rich Wells - N2MCA

Introduction

In an effort to better understand the operation of the Yupiteru MVT-7100, and to offer a valuable resource to
other people who may be using these wonderful radios, I wrote this owner’s guide.

It does not hurt that the originally supplied manual that comes with the radio is rather poor. Like many
translations from the original Japanese, the grammar leaves much to be desired. And, on the whole, the
organization of the topics is not helpful in gaining a useful understanding of the radio and how all the pieces
interrelate.

This guide goes through the operation of the MVT-7100 in a step-by-step process starting with the basics
and builds up to the operation of the more advanced features.

While I’ve never had the pleasure of playing with the MVT-7200, most of what appears here should apply to
it. Where there are differences that I know of between these two radios, I have pointed them out as best I
could.

Feel free to make copies of this document and distribute as you see beneficial to the radio monitoring
hobby as long as it is done FREE of charge. I simply ask that this information be kept intact. A lot of hard
work and effort has gone into the writing of this guide. I would appreciate it if every effort is made to keep
this document whole with me as the original author.

If you would like to share your thoughts about this owner’s guide, have suggestions for its improvement or
have further questions, feel free to send me e-mail.

Happy reading and strong signals!

Rich Wells
N2MCA

[e-mail]
http://www.strongsignals.net/

Table Of Contents

Warning
Features
Resources
Memory

Organization

Definitions &

Terms

Available Modes

Terminology
Mode Operations
VFO Mode
Memory Mode
Scanning Modes
Search Band

Programming
Mode

Searching Modes
Search Pass Mode
Priority Mode
Other Features
AM Antenna
Attenuator
Battery Saver
Beep

Delay
Lamp
Monitor
Reset
Skip
Acknowledgement

s

Warning

If the radio is being used with standard alkaline batteries, do not use the AC or car power adapters.
External power should only be applied to the radio when it has been equipped with rechargeable batteries
or the batteries have been removed from the radio.

Even if you do use power in this manner with rechargeable batteries, leaving the radio plugged in
continually will overcharge and overheat the batteries. Both of which will drastically shorten their lifespan.

Features

1000 channels
500 search pass frequencies
10 memory banks
10 search bands
13 step sizes (MVT-7200)
12 step sizes (MVT-7100)
6 receive modes (MVT-7200)
5 receive modes (MVT-7100)
1 priority channel
Large, full function, LCD
VFO
Squelch monitor
Rotary control
Attenuator
Programmable battery save
Programmable beep

Resources

1000 Memory channels (0-999)
500 Search pass frequencies
100 Channels/bank
10 Memory banks (1-0)
10 Search bands (1-0)
13 Step sizes (MVT-7200: 50/100 Hz
1/5/6.25/9/10/12.5/20/25/50/100/125 kHz)

Memory Organization

Bank Channels

---- --------­1 000 - 099
2 100 - 199
3 200 - 299
4 300 - 399
5 400 - 499
6 500 - 599
7 600 - 699
8 700 - 799
9 800 - 899

0 900 - 999
Priority channel is memory channel 1000

12 Step sizes (MVT-7100: 50/100 Hz
1/5/6.25/9/10/12.5/20/25/50/100 kHz)
6 Receive modes (MVT-7200:

AM/NAM/FM/WFM/USB/LSB)

5 Receive modes (MVT-7100: AM/

FM/WFM/USB/LSB)

1 Priority channel

Definitions & Terms

Here are some basic definitions as well as terms used in the MVT-7100 Instruction Manuals that will help
you to use this guide more effectively.

Attenuator

A device which is used to diminish the strength of an incoming signal. This is typically used to alleviate
overloading of the front end radio circuitry by very strong, and usually nearby, transmissions. The MVT­7100 allows you to set the attenuator for individual memory channels as well as while performing a search.

Memory bank

An association of memory channels. This radio has 10 memory banks (1-0). Since it also has 1000
memory channels, this means there are 100 memory channels per memory bank.

Memory channel

A location used to store a frequency and its associated receive mode.
The MVT-7100 has 1000 memory channels which are divided into 10 banks.

Pass

Refers to scanning and searching operations. A memory channel can be passed so that it is not checked
during a scan operation. A frequency can be passed so it is not checked during a search operation. See
Scan Pass and Search Pass for more information.

Priority Channel

Special memory channel that can be checked on a periodic basis for active transmissions. This is usually
programmed with very important frequency that you do not want to miss activity on. The MVT-7100 has 1
priority channel which is located at the end of “normal” memory.

Receive Mode

The method by which radio transmissions will be demodulated so that the resultant audio portion may be
directed to the speaker. Available receive modes are :

AM - Amplitude Modulation (below 30MHz, amateur radio, commercial

and military aircraft)

NAM - Narrow AM (mainly used below 25MHz; only found on the MVT-7200)
FM - Frequency Modulation (most VHF/UHF communications)
WFM - Wide FM (for FM radio and TV audio)
USB - Upper Sideband (mainly used below 25MHz & amateur radio bands)
LSB - Lower Sideband (mainly used below 25MHz & amateur radio bands)

Scan Pass

Most receivers refer to this feature as channel lockout. Once a frequency has been programmed into
memory, a scanning operation will stop on this channel if an active transmission is detected. Certain
frequencies may contain transmissions which are very or always active. To keep the scanning operation
from stopping on these channels, they can be locked-out/skipped/passed during a scan.

Scanning

The act whereby memory channels are successively checked for active radio transmissions of their
programmed frequencies.

Search band

A feature which allows a pre-defined frequency range to be programmed so that it can be repeatedly
searched for active transmissions. Stored with each search band are a starting frequency, ending
frequency, receive mode and step size. The MVT-7100 has 10 search bands.

Search Pass

Some receivers refer to this feature as search-skip. If you have a known frequency, which you would like to
skip while performing a search, it can be placed in a special memory. Yupiteru refers to this as the Search
Pass Memory. Once placed in this memory, this frequency will not be tested for an active transmission, or
in other words it’s skipped/passed when performing a search. The MVT-7100 has 500 Search pass
frequencies.

Searching

The act whereby a frequency is incremented or decremented successively to detect active radio
transmissions in a given frequency range. Searching is usually performed on a programmed Search Band.

Skip

The MVT-7100 has a feature called skip, which allows a paused scan or search to resume after a fixed
time. Normally, during a scan or search, if an active transmission is detected, the scanning or searching
operation will be paused until the transmission ceases. Once the transmission goes away, the scanning or
searching operation resumes. If you have the index feature enabled, scanning or searching will pause on
an active transmission for at most 5 seconds before resuming.

Step size

A value in Hertz (Hz) or kiloHertz (kHz) that indicates the amount by which a frequency will be changed due
to user or radio control while searching for active transmissions or using a VFO.

Available step sizes are :

Hz : 50/100
kHz : 1/5/6.25/9/10/12.5/20/25/50/100/125

NOTE: Only the MVT-7200 has the 125 kHz step size

S-meter

A feature used to graphically represent the strength of the signal being received. It is usually calibrated to a
dB (logarithmic) scale. A bar graph is used where more bars indicate a stronger signal.

VFO

A temporary location to store a frequency so that a memory channel does not have to be programmed.
Associated with this frequency are various settings such as receive mode, step size, attenuator, and delay.

Available Modes

Memory

The radio is in Memory mode when a memory channel number is visible in the upper left corner and
followed by the CH indicator. Pressing the MR key toggles between Memory and VFO modes.

Priority

Priority mode is enabled when the PRI indicator is visible. This is a mode independent of the VFO, Memory,
Scanning or Searching modes.

Scanning

In this mode, the scanning operation checks the specified banks for active transmissions on the
programmed frequencies within those banks. There are two scanning modes with three scanning sub­modes for a total of six different types of scan that can be performed.

The two modes are :

Continuous: scanning of all non-empty banks
Bank: scanning of up to four banks

The three sub-modes are :

Normal: a normal scan
Mode: scans only those channels with the specified receive mode
Program: scans only those channels which have been program tagged

This gives us the following six scan mode types:

Continuous Normal
Continuous Mode
Continuous Program
Bank Normal
Bank Mode
Bank Program

Search Band Programming

In this mode, the search bands (1-0) used to perform searches are programmed with starting and ending
frequencies as well as step sizes and receive modes.

Searching

In this mode, the searching operation checks for active transmissions on the frequencies in the specified
search range. There are two searching modes which can be performed.

The two modes are :

VFO: starts searching from the current VFO frequency
Band: search a preprogrammed search band

Search Pass

The radio is in Search Pass mode when a blinking P indicator is visible and the contents of the Search Pass
memory are being displayed.

VFO

The radio is in VFO mode when there is a frequency displayed but no memory channel or ‘CH’ LCD
indicator present. Pressing the MR key toggles between VFO and Memory modes.

Terminology

When you see ‘FUNC + key’
Press FUNC
You will hear a beep (if enabled) and FUNC will be displayed
Press ‘key’

Mode Operations

VFO Mode

VFO holds:

Frequency
Step size
Receive mode
Attenuator
Delay
Skip

How to change the frequency

Simply key in the desired frequency

1. Enter the frequency

2. If you make a mistake during entry

A. Press C/AC
B. Use arrow keys to select digit to be corrected
C. Change digit using key press or rotary control
D. Press ENT when completed

3. Press ENT

NOTE: Instead of correcting at step 2 above, simply press C/AC twice and start over with the frequency entry.

Use the rotary control or arrow keys

Use the rotary control or arrow keys to increase or decrease the currently displayed frequency by the
currently set step size. Holding down an arrow key will change the frequency rapidly.