xrvsmr
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionLast revisionBoth sides next revision | ||
xrvsmr [2024/06/17 10:14] – wadmin | xrvsmr [2024/06/17 12:48] – wadmin | ||
---|---|---|---|
Line 3: | Line 3: | ||
{{drawio> | {{drawio> | ||
- | Test procedure for XR18 vs MR18 measurement. | + | ==== Introduction ==== |
- | A couple of disclaimers starting by a general statement: | + | This document proposes |
- | Measurements are done as close as possible to what would be a scientific measurement process (Configuration | + | |
- | | + | ==== Disclaimers and Claims ==== |
+ | |||
+ | Starting with a general statement: Measurements are done as close as possible to what would be a scientific measurement process (Configuration and tests are documented, are reproducible by a third party, tests results are published, known assumptions and limitations are mentioned as far as possible). | ||
+ | |||
+ | Now the claims: | ||
+ | |||
+ | * **Statement #1** : Measurements are done in recording studio environment. Namely, there is no control on CEM/EMI interfering with measurements apart from standard studio installation best practices in terms of proper ED grounding and shielding. | ||
* As a consequence, | * As a consequence, | ||
- | * Assumption | + | * **Statement |
- | * As a consequence, | + | * As a consequence, |
- | * Statement #1 : XR18 has two high impedance instrument inputs which MR18 does not have. For the sake of comaparing | + | |
+ | |||
+ | Measurement Gear | ||
+ | * UUTs | ||
+ | * MR18 S211000533C8H | ||
+ | * XR18 **XXXXXXXXXXXX** | ||
+ | * Tools | ||
+ | * Gen2 Apollo Twin USB | ||
+ | * XLR Wires / Jack Adapters | ||
+ | * Room EQ Wizard Rev xxx for measurement | ||
------------- | ------------- | ||
+ | |||
+ | ===== Test Procedure ===== | ||
==== T1 - Inner Noise ==== | ==== T1 - Inner Noise ==== | ||
Line 30: | Line 46: | ||
{{drawio> | {{drawio> | ||
- | === XR18 Measurement === | + | === *R18 Measurement === |
== -12dBfs / G=0 == | == -12dBfs / G=0 == | ||
+ | * Set Inputs Gain to 0dB | ||
+ | * Set Output level to match a -12dBfs input level | ||
+ | * Measure RTA and store | ||
== -20dBfs / G=0 == | == -20dBfs / G=0 == | ||
+ | * Set Inputs Gain to 0dB | ||
+ | * Set Output level to match a -20dBfs input level | ||
+ | * Measure RTA and store | ||
== -12dBfs / G=8dB == | == -12dBfs / G=8dB == | ||
+ | * Set Inputs Gain to 8dB | ||
+ | * Set Output level to match a -12dBfs input level | ||
+ | * Measure RTA and store | ||
- | == -30dBfs | + | == -12dBfs |
+ | * Set Inputs Gain to 18dB | ||
+ | * Set Output level to match a -12dBfs input level | ||
+ | * Measure RTA and store | ||
- | === MR18 Measurement | + | == -12dBfs / G=28dB == |
+ | * Set Inputs Gain to 28dB | ||
+ | * Set Output level to match a -12dBfs input level | ||
+ | * Measure RTA and store | ||
+ | |||
+ | ------------- | ||
+ | |||
+ | ==== T2 - External loop comparison ==== | ||
+ | |||
+ | === Setup === | ||
+ | |||
+ | {{drawio> | ||
+ | |||
+ | === *R18 Procedure | ||
== -12dBfs / G=0 == | == -12dBfs / G=0 == | ||
+ | * Set Inputs Gain to 0dB | ||
+ | * Set Output level to match a -12dBfs input level | ||
+ | * Measure Transfer function and store | ||
== -20dBfs / G=0 == | == -20dBfs / G=0 == | ||
+ | * Set Inputs Gain to 0dB | ||
+ | * Set Output level to match a -20dBfs input level | ||
+ | * Measure Transfer function and store | ||
== -12dBfs / G=8dB == | == -12dBfs / G=8dB == | ||
+ | * Set Inputs Gain to 8dB | ||
+ | * Set Output level to match a -12dBfs input level | ||
+ | * Measure Transfer function and store | ||
- | == -30dBfs | + | == -12dBfs |
+ | * Set Inputs Gain to 18dB | ||
+ | * Set Output level to match a -12dBfs input level | ||
+ | * Measure Transfer function and store | ||
- | ------------- | + | == -12dBfs / G=28dB == |
+ | * Set Inputs Gain to 28dB | ||
+ | * Set Output level to match a -12dBfs input level | ||
+ | * Measure Transfer function and store | ||
- | ==== T2 - External loop comparison ==== | ||
- | |||
- | === Setup === | ||
- | |||
- | {{drawio> |
xrvsmr.txt · Last modified: 2024/06/17 12:51 by wadmin