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Does anyone know where I can find a copy of the following document:
"Communication Standard for Programmable Devices (Spec. #30381-000)"
This document describes how to transfer a single bit of information between a hearing instrument and a programmer box.
Thanks,
1) I cannot use two separate multi-meters. The readings need to be synchronized.
2) The input range for the DC current is between 100uA and 1A. The input range for the DC voltage is between 1mV and 10V
3) I do not want to use voltage dividers.
4) I do not want to use shunt resistors for...
Hi all,
I am looking for a Dual channel Digital Multi-meter that can measure both DC voltage and DC current simultaneously. I would also like to log the measured date at controlled intervals (anything between 1 sample/second to 1 sample/minute). After the end of the measurement I need to send...
Hi all,
I am dealing with a small loop antenna taht is supposed to work at 2.44GHz. My measurements with VNA shows taht the current designed antenna is resonating at 2.64GHz and has a 60MHz bandwidth. Two questions:
1) How can I increase the antenna bandwidth from 60MHz to 200MHz?
2) Can I...
Although I have some control on the cable length, but it is within a limited range. The cable length could be anything between 35mm and 45mm. Therefore, a λ/4 monpole (3 cm piece of wire) is not possible in this design. The length of the board is about 8mmx35mm (WxL). Please let me know if any...
Hi GoldSmith,
Here is a drawing that shows what I have in my mind:
Obviously, getting the best performance for the antenna is what I am looking for. I would like to know if this scheme works. If not then what the right approach is and if yes then how should I calculate the length of the...
Hi all,
I would like to know how I can use a multi-wire cable (including battery and wires that carry audio signals) as a 2.4GHz antenna. The cable has no shielding and all wires go in parallel with each other in the cable. The cable is about one foot long, however, I can change the cable...
Ok, I think I found a work around for this problem as below:
If you get the ORCAP-36006 warning when trying to generate netlist, you need to open a DOS command window, add the –l 255 switch to the netlist generator command (put it after the –v 3 command) and run it.
For example, if you get...
I would like to make a package symbol for a printed coil in Allegro 16.6. This coil has two pins that are obviously shorted together through the printed coil. Because of this short circuit, I get a DRC error. How can I solve this issue and define a printed coil as a two pins component?
Hi,
I am new to Orcad 16.6 (I have been using Orcad 10.5 before) and have difficulty with creating netlist for PCB Editor. I created a simple schematic with few components in it. None of the components' name are longer than 31 characters. However, when I generate netlist I get the following...
What is the difference between tuning an antenna and matching an antenna?
Assume that I have an antenna that is not exactly resonating at my desired frequency. Should I first try changing the antenna geometry to move the resonance frequency to my desired band and then find the right matching...
Hi folks,
I am very new to the field of RF measurement and need some help to correctly set up the VNA, interfacing cables, connectors and DUT to make a correct measurement. Using my Anritsu MS2024B VNA, I would like to measure the impedance and Return Loss of a 2.4GHz printed antenna (such as a...
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